Research Progress in the Estimation Models of Grassland Net Primary Productivity

doi:10.11733/j.issn.1007-0435.2011.02.030

›› 2011, Vol. 19 ›› Issue (2): 356-366.DOI: 10.11733/j.issn.1007-0435.2011.02.030

Research Progress in the Estimation Models of Grassland Net Primary Productivity

ZHANG Mei-ling^1,2, JIANG Wen-lan¹, CHEN Quan-gong³, ZHAO You-yi², LIU Xiao-ni¹

1. College of Prataculture, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
2. College of Science, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
3. College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu Province 730020, China

Received:2010-12-15 Revised:2011-03-01 Online:2011-04-15 Published:2011-04-15

草地净第一性生产力估算模型研究进展

张美玲^1,2, 蒋文兰¹, 陈全功³, 赵有益², 柳小妮¹

1. 甘肃农业大学草业学院, 甘肃, 兰州, 730070;
2. 甘肃农业大学理学院, 甘肃, 兰州, 730070;
3. 兰州大学草地农业科技学院, 甘肃, 兰州, 730020

通讯作者: 柳小妮,E-mail:zhangml2005@lzu.cn
作者简介:张美玲(1978- ),女,甘肃金塔人,讲师,博士研究生,主要从事草地生态学和数学模型的研究,E-mail:zhangml@gsau.edu.cn
基金资助:
国家自然科学基金项目(30960264);教育部人文社会科学研究规划基金项目(10YJAZH047);甘肃农业大学科技创新基金资助

Abstract

Abstract: Grassland net primary production(NPP) can directly reflect the production capacity of grassland communities in a natural environment.Grassland NPP is an important part of the grassland carbon cycle.Simulating NPP using mathematical models has become an important and widely accepted research approach.Climate-productivity statistical models,light utilization efficiency models,eco-physiological processing models and remote sensing applications coupled with the eco-physiological process models are the primary models for grassland NPP estimation.The achievements and problems of these models are reviewed comprehensively and systematically.A future development trend of NPP estimation is further proposed in this paper.The statistical models calculate NPP base on the relationships between NPP and climatic variables(i.e.,temperature,precipitation),which require simple parameters and give poor accuracy.The theoretical basis of light utilization efficiency models is an analytical technique of photosynthesis based on the concept of photosynthesis and its associated efficiency of light utilization.Its format is simple and can use remote sensing data.Therefore,light utilization efficiency models attract much attention;even so,it has questionable results.Process modelling simulates a series of plant ecophysiological and biophysical processes to reveal their active mechanisms,but it is more complex compared with other models and may have limited practicality.Remote sensing applications coupled with the eco-physiological process model can use collected sensing data to overcome disadvantages of the light utilization efficiency and ecophysiological processing models.This may well become a major developing direction for grassland NPP estimation.Studies in grassland NPP estimation are sparse and special studies in the modeling of the grassland NPP are not commonly reported.This procedure is meaningful to develop the grassland NPP for China as another tool with freedom knowledge property right and performance.

Key words: Grassland, Net primary productivity, Mathematical models, Remote sensing data

摘要： 草地净第一性生产力(NPP)直接反映了草地植物群落在自然环境条件下的生产能力,是草地碳循环的重要组成部分。利用数学模型估算草地NPP是一种重要且被广泛接受的研究方法。在总结植被NPP估算模型的基础上,分析了气候相关统计模型、光能利用率模型、生态系统过程模型和生态遥感耦合模型各自的优缺点,讨论了各类模型在草地NPP中的研究现状,探讨了草地NPP模型研究中存在的问题,并进一步提出今后的发展方向。统计模型通过NPP与温度、降水等气候因子建立统计关系计算NPP,参数简单,但估算结果较粗;光能利用率模型以植被光合作用机理作为其理论基础,建立在植物光合作用过程和光能利用率的概念上,由于模型形式简单且可以直接利用遥感数据,使其倍受关注,但在具体求算过程中存在不确定性;过程模型从机理上对植物的生理生态过程进行模拟并对NPP的影响因子进行分析,更能揭示生物生产过程以及与环境相互作用的机理,但模型较复杂,实用性不强;生态遥感耦合模型能够利用遥感资料,克服了光能利用率模型和生态系统过程模型的不足,使其成为NPP模型的一个主要发展方向。草地植被NPP估算模型的研究相对薄弱,专门针对草地NPP建模的研究较少。建立具有自主知识产权的中国草地NPP模型是一项即具有重要意义又具有挑战性的工作。

关键词: 草地, 净第一性生产力(NPP), 数学模型, 遥感数据

CLC Number:

S812

ZHANG Mei-ling, JIANG Wen-lan, CHEN Quan-gong, ZHAO You-yi, LIU Xiao-ni. Research Progress in the Estimation Models of Grassland Net Primary Productivity[J]. , 2011, 19(2): 356-366.

张美玲, 蒋文兰, 陈全功, 赵有益, 柳小妮. 草地净第一性生产力估算模型研究进展[J]. , 2011, 19(2): 356-366.

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References

[1] Liu J,Chen J M,Chen W.Net primary productivity distribution in the BOREAS region from a process model using satellite and surface data[J].Journal of Geophysical Research,1999,104(D22):27735-27754
[2] Roxburgh S H,Berry S L,Buekley T N,et al.what is NPP?Inconsistent accounting of respiratory fluxes in the definition of net primary production[J].Functional Ecology,2005,19:378-382
[3] Murakami K,Sasai T,Yamaguchi Y.A new one-dimensional simple energy balance and carbon cycle coupled model for global warming simulation[J].Theoretical and Applied Climatology,2009,101(3-4):459-473
[4] Rosswall T.The international geosphere-biosphere programme:a study of global change(IGBP)[J].Environmental Geology,1992,20(2):77-78
[5] IGBP Terrestrial Carbon Working Group.The terrestrial carbon cycle:Implications for Kyoto protocol[J].Science,1998,280:1393-1394
[6] Lieth H,Whittaker R H.Primary productivity of the biosphere[M].New York:Springer-Verlag Press,1975.237-263
[7] 任继周,胡自治,张自和,等.中国草业生态经济区初探[J].草业学报,1999,8(1):12-22
[8] Tan K,Piao S L,Peng C H,et al.Satellite based estimation of biomass carbon stocks for northeast China's forests between 1982 and 1999[J].Forest Ecology and Mnagement,2007,240:114-121
[9] 张伟科,刘玉杰,封志明,等.内蒙古天然草地生产潜力及其限制性研究[J].草地学报,2008,16(6):572-579
[10] Ni J.Estimating net primary productivity of grasslands from field biomass measurements in temperate northern China[J].Vegetatio,2004,174(2):217-234
[11] 李建龙.利用投影寻踪回归技术进行草地产量预报的研究[J].草地学报,1995,3(1):65-74
[12] Cramer W,Kicklighter D W,Bondeau A,et al.Comparing global models of terrestrial net primary productivity(NPP):Overview and key results[J].Global Change Biology,1999,1(suppl.):1-15
[13] 王莺,夏文韬,梁天刚,等.基于MODIS植被指数的甘南草地净初级生产力时空变化研究[J].草业学报,2010,19(1):210-201
[14] Ruimy A,Sougier B.Methodology for the estimation of terrestrial net primary productivity from remotely sensed data[J].Journal of Geophysical Research,1994,99:5263-5283
[15] Potter C S,Randerson J T,Field C B,et al.Terrestrial ecosystern production:A process model based on global satellite and surface data[J].Global Biogeochemical Cycles,1993,7:811-841
[16] Prince S D,Goward S N.Global primary production:A remote sensing approach[J].Journal of Biogeography,1995,22:815-835
[17] Running S W,Coughlan J c.A general model of forest ecosystem process for regional applications Ⅰ.Hydrologic balance,canopy gas exchange and primary production processes[J].Ecological Modelling,1988,42:125-154
[18] Running S W,Hunt E R.Generalization of a forest ecosystem process model for other biomes,BIOME-BGC,and an application for global-scale models[A].In:Ehleringer J R,ed.Scaling physiological processes:Leaf to globe[C].San Diego,CA:Academic Press,1993.141-158
[19] Parton W J,Seurlock J M O,Ojima D S,et al.Observations and modeling of biomass and soil organic matter dynamics for the grassland biome worldwide[J].Global Biogeochemical Cycles,1993,7:785-809
[20] Lieth H,Box E.The gross primary production pattern of the land vegetation:A first attempt[J].Journal of Tropical Ecology,1977,18:109-115
[21] 牛建明.气候变化对内蒙古草原分布和生产力影响的预测研究[J].草地学报,2001,9(4):277-282
[22] Lieth H.Modeling the primary productivity of the world[J].Nature and Resources,1972,8(2):5-10
[23] 刘明春,马兴祥,尹东,等.天祝草甸、草原草场植被生物量形成的气象条件及预测模型[J].草业科学,2001,18(3):65-68
[24] Golubyamikov L L,Denisenko E A.Modeling the values of net primary production for the zonal vegetation of European Russia[J].Biology Bulletin,2001,28(3):293-300
[25] 龙爱华,王浩,程国栋,等.黑河流域中游地区净初级生产力的人类占用[J].应用生态学报,2008,19(4):853-858
[26] 高浩,潘学标,符瑜.气候变化对内蒙古中部草原气候生产潜力的影响[J].中国农业气象,2009,30(3):277-282
[27] 刘洪杰.Miami模型的生态学应用[J].生态科学,1997,16(1):52-55
[28] Lieth H,Box E.Evapotranspiration and primary productivity.In:Thornthwaite W,ed.Memorial model,publications in climatology[C].New Jersey:C.W.Thornthwaite Associates,1972.37-46
[29] 何玉斐,赵明旭,王金祥,等.内蒙古农牧交错带草地生产力对气候要素的响应-以多伦县为例[J].干旱气象,2008,26(2):84-89
[30] 杨泽龙,杜文旭,侯琼,等.内蒙古东部气候变化及其草地生产潜力的区域性分析[J].中国草地学报,2008,30(6):62-66
[31] 韩芳,苗百岭,郭瑞清,等.内蒙古高原荒漠草原植物气候生产力时空演变特征[J].安徽农业科学,2010,38(18):9717-9719
[32] 任继周.草地农业生态学[M].北京:中国农业出版社,1995.51-84
[33] Uchijima z,Seino H.Agroclimatic evaluation of net primary productivity of natural vegetations(1)Chikugo model for evaluating net primary productivity[J].Journal of Agricultural Meteorology,1985,540(4):343-352
[34] 候光良,游松才.用筑后模型估算我国植物气候生产力[J].自然资源学报,1990,5(1):60-65
[35] 林慧龙,常生华,李飞.草地净初级生产力模型研究进展[J].草业科学,2007,24(12):26-29
[36] 王胜兰.基于5种气候生产力模型的鸟鲁木齐地区NPP计算分析[J].沙漠与绿洲气象,2008,2(4):40-44
[37] 朱志辉.自然植被净初级生产力估计模型[J].科学通报,1993,38(15):1422-1426
[38] 公延明,胡玉昆,阿德力·麦地,等.高寒草原对气候生产力模型的适用性分析[J].草业学报,2010,19(2):7-13
[39] 周广胜,张新时.自然植被净第一性生产力模型初探[J].植物生态学报,1995,19(3):193-200
[40] 周广胜,张新时.全球气候变化的中国自然植被的净第一性生产力研究[J].植物生态学报,1996,20(1):11-19
[41] 孙善磊,周锁铨,石建红,等.应用三种模型对浙江省植被净第一性生产力(NPP)的模拟与比较[J].中国农业气象,2010,31(2):271-276
[42] 赵传燕,程国栋,邹松兵,等.西北地区自然植被净第一性生产力的空间分布[J].兰州大学学报,2009,45(1):42-49
[43] 普宗朝,张山清,王胜兰.近47年天山山区自然植被净初级生产力对气候变化的响应[J].中国农业气象,2009,30(3):283-288
[44] 李镇清,刘振国,陈佐忠,等.中国典型草原区气候变化及其对生产力的影响[J].草业学报,2003,12(1):4-10
[45] 王景升,张宪洲,赵玉萍,等.羌塘高原高寒草地生态系统生产力动态[J].应用生态学报,2010,21(6):1400-1404
[46] Ran J z,Hu Z Z,Zhao J,et al.A grassland classification systern and its application in China[J].The Rangeland Journal,2008,30:199-209
[47] Lin H L.A new model of grassland net primary productivity (NPP)based on the integrated orderly classification system of grassland[C].The Sixth International Conference on Fuzzy Systems and Knowledge Discovery,2009.52-56
[48] 任继周,梁天刚,林慧龙,等.草地对全球气候变化的响应及其碳汇潜势研究[J].草业学报,2011,20(2):1-22
[49] Zaks D P M,Ramankutty N,Barford C C,et al.From Miami to Madison:Investigating the relationship between climate and terrestrial net primary production[J].Global Biogeochemical Cycles,2007,21,GB3004
[50] Del G S,Parton W,Stohlgren T,et al.Global potential net primary production predicted from vegetation class,precipitation,and temperature[J].Ecology,2008,89:2117-2126
[51] Goetz S J,Prince S D,Goward S N,et al.Satellite remote sensing of primary production:an improved production efficiency modeling approach[J].Ecological Modelling,1999,122:239-255
[52] Bloom A J,Chapin F S,Mooney H A.Resource limitation in plants-An economic analogy[J].Annual Review of Ecology,1985,16:363-392
[53] Monteith J L.Solar radiation and productivity in tropical ecosystems[J].Journal of Applied Ecology,1972,9(3):747-766
[54] Begue A.Leaf area index,intercepted photosyntheticaIly active radiation,and spectral vegetation indices:Sensitivity analysis for regularly shaped canopies[J].Remote Sensing Environment,1993,46:45-49
[55] Sellers P J.Canopy reflectance,photosynthesis,and transpiration Ⅱ.The role of biophysics in the linearity of their interdependence[J].Remote Sensing Environment,1987,21:143-183
[56] 朱文泉,陈云浩,徐丹,等.陆地植被净初级生产力计算模型研究进展[J].生态学杂志,2005,24(3):296-300
[57] Verstraeten W W,Veroustraete F,Feyen J.On temperature and water limhation of net ecosystem productivity:lmplementation in the C-Fix model[J].Ecological Modelling,2006,199:4-22
[58] Lafont S,Kergoat L,Dedieu G,et al.Spatial and temporal variability of land CO2 fluxes estimated with remote sensing and analysis data over western Eurasia[J].Tellus,Series B:Chemical and Physical Meteorology,2002,54:820-833
[59] Heinsch F A,Zhao M,Running S W,et al.Evaluation of remote sensing based terrestrial productivity from MODIS using regional tower eddy flux network observations[J].IEEE Transactions on Geoscience and Remote Sensing,2006,44;1908-1923
[60] Sasai T,lehii K,Yamaguchi Y,et al.Simulating terrestrial carbon fluxes using the new biosphere model"biosphere model integrating eco-physiological and mechanistic approaches using satellite data"(BEAMS)[J].Journal of Geophysical Research,2005,110,G02014
[61] Field C B,Behrenfeld M J,Randerson J T,et al.Primary production of the biosphere:integrating terrestrial and oceanic components[J].Science,1998,281:237-240
[62] Field C B,Randerson J T,MalmstrOm C M.Global net primary production:combining ecology and remote sensing[J].Remote Sensing Environment,1995,51:74-88
[63] 朴世龙,方精云,郭庆华.利用CASA模型估算我国植被净第一性生产力[J].植物生态学报,2001,25(5):603-608
[64] Nayak R K,Patel N R,Dadhwal V K.Estimation and analysis of terrestrial net primary productivity over India by remotesensing-driven terrestrial biosphere model[J].Environmental Monitoring and Assessment,2010,170(1-4):195-213
[65] Hicke J A,Asner G P,Randerson J T,et al.Trends in North American net primary productivity derived from satellite observations,1982-1998[J].Global Biogeochemical Cycles,2002,16(2):1019-1040
[66] Xing X,Xu X,Zhang X.Simulating net primary production of grasslands in northeastern Asia using MODIS data from 2000to 2005[J].Journal of Geography Science,2010,20(2):193-204
[67] 朱文泉,潘耀忠,张锦水.中国陆地植被净初级生产力遥感估算[J].植物生态学报,2007,31(3):413-424
[68] 高清竹,万运帆,李玉娥,等.基于CASA模型的藏北地区草地植被净第一性生产力及其时空格局[J].应用生态学报,2007,18(11):2526-2532
[69] Gao Q Z,Li Y,Wan Y F.et al.Dynamics of alpine grassland NPP and its response to climate change in Northern Tibet[J].Climatic Change,2009,97:515-528
[70] 裴志永,周才平,欧阳华,等.青藏高原高寒草原区域碳估测[J].地理研究,2010,129(1):102-110
[71] 李刚,辛晓平,王道龙,等.改进CASA模型在内蒙古草地生产力估算中的应用[J].生态学杂志,2007,26(12):2100-2106
[72] 张峰,周广胜,王玉辉.基于CASA模型的内蒙古典型草原植被净初级生产力动态模拟[J].植物生态学报,2008,32(4):786-797
[73] 韦莉,赵军,潘竞虎,等.基于MODIS数据的黄土高原草地净初级生产力的估算研究[J].遥感技术与应用,2009,24(5):660-664
[74] 崔林丽,史军,唐娉,等.中国陆地净初级生产力的季节变化研究[J].地理科学进展,2005,24(3):8-16
[75] 王兆礼,陈晓宏.珠江流域植被净初级生产力及其时空格局[J].中山大学学报(自然科学版),2006,45(6):106-110
[76] 樊江文,邵全琴,刘纪远,等.1988-2005年三江源草地产草量变化动态分析[J].草地学报,2010,18(1):5-10
[77] Gao Z Q,Liu J Y,Cao M K.Impacts of land use and climate change on regional net primary productivity[J].Journal of Geographical Sciences,2004,14(3):349-358
[78] Veroustraete F,Sabbe H,Rasse D Ptet al.Carbon mass fluxes of forests in Belgium determined with low resolution optical sensors[J].International Journal of Remote Sensing,2004,25:769-792
[79] Verstraeten W W,Veroustraete F,Heyns W,et al.On uncertainties in carbon flux modelling and remotely sensed data assimilation:The Brasschaat pixel case[J].Advances in Space Research,2008,41:20-35
[80] Chhabra A,Dhadwall V K.Estimating terrestrial net primary productivity over India using satellite data[J].Current Science,2004,86(2):269-271
[81] 卢玲,李新,Frank V.黑河流域植被净初级生产力的遥感估算[J].中国沙漠,2005,25(6):823-830
[82] 卢玲,李新,Frank V.中国西部地区植被净初级生产力的时空格局[J].生态学报,2005,25(5):1026-1032
[83] 陈斌,王绍强,刘荣高,等.中国陆地生态系统NPP模拟及空间格局分析[J].资源科学,2007,29(6):45-53
[84] Ito A,Oikawa T.A simulation model of the carbon cycle in land ecosystems(Sim-CYCLE):A description based on drymatter production theory and plot-scale validation[J].Ecological Modelling,2002,151:143-176
[85] McGuire A D,Melillo J M,Kicklighter D W,et al.Equilibrium responses of soil carbon to climate change:Empirical and process-based estimate[J].Journal of Biogeography,1995,22:785-796
[86] Warnant P,Francois L,Strivay D,et al.CARAIB:A global model of terrestrial biological productivity[J].Global Biogeochemical Cycles,1994,8:255-270
[87] White M A,Thornton P E,Running S W,et al.Parameterization and sensitivity analysis of the BIOME-BGC terrestrial eco-system model:net primary production controls[J].Earth Interactions,2000,4:1-85
[88] Liu J,Chen J M,Cihlar J,et al.A process-based boreal ecosystem productivity simulator using remote sensing inputs[J].Remote Sensing of Environment,1997,62:158-175
[89] Dong W J,Qi Y,Li H M,et al.Modeling carbon and water budgets in the Lushi Basin with Biome-BGC[J].Chinese Journal ofPopulation,Resources and Environment,2005,3(2):27-34
[90] 国志兴,王宗明,张柏,等.2000年～2006年东北地区植被NPP的时空特征及影响因素分析[J].资源科学,2008,30(8):1226-1235
[91] 董明伟,喻梅.沿水分梯度草原群落NPP动态及对气候变化响应的模拟分析[J].植物生态学报,2008,32(3):531-543
[92] 肖向明,王义凤,陈佐忠.内蒙古锡林河流域典型草原初级生产力和土壤有机质的动态及其对气候变化的反应[J].植物学报,1996,38(1):45-52
[93] 周才平,欧阳华,王勤学,等.青藏高原主要生态系统净初级生产力的估算[J].地理学报,2004,59(1):74-79
[94] Nemani R R,Keeling C D,Hashimoto H,et al.Climate-driven increases in global terrestrial net primary production from 1982to 1999[J].Science,2003,300:1560-1563
[95] 王军邦,刘纪远,邵全琴,等.基于遥感-过程耦合模型的1988～2004年青海三江源区净初级生产力模拟[J].植物生态学报,2009,33(2):254-269
[96] 张杰,潘晓玲,高志强,等.基于遥感-生态过程的绿洲-荒漠生态系统净初级生产力估算[J].干旱区地理,2006,29(2):255-261
[97] 郑凌云.基于卫星遥感与BEPS生态模式的藏北草地变化及NPP动态研究[D].北京:中国气象科学研究院,2006
[98] Scurlock J M O,Johnson K,Olson R J.Estimating net primary productivity from grassland biomass dynamics measurements[J].Global Change Biology,2002,8:736-753
[99] 朴世龙,方精云,贺金生,等.中国草地植被生物量及其空间分布格局[J].植物生态学报,2004,28(4):491-498
[100] Lauenroth W K,Wade A A,Williamson M A,et al.Uncertainty in calculations of net primary production for grasslands[J].Ecosystems,2006,9;843-851

Research Progress in the Estimation Models of Grassland Net Primary Productivity

草地净第一性生产力估算模型研究进展

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