Effects of Medicago sativa on Soil Nutrients and Microbial Biomass under Different Years in the Arid Area of Northern Weihe River Basin

doi:10.11733/j.issn.1007-0435.2015.06.009

Acta Agrestia Sinica ›› 2015, Vol. 23 ›› Issue (6): 1190-1196.DOI: 10.11733/j.issn.1007-0435.2015.06.009

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Effects of Medicago sativa on Soil Nutrients and Microbial Biomass under Different Years in the Arid Area of Northern Weihe River Basin

ZHANG Bao-quan¹, LI Hong-hong², MA Hu³, CHENG Ji-min^1,2,4,5, JIN Jing-wei^4,5, ZHU Ren-bin¹, CHENG Guang-qing²

1. College of Natural Resources and Environment, Yangling, Shaanxi Province 712100, China;
2. College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi Province 712100, China;
3. Rural energy station of Ningxia, Yinchuan, Ningxia 750002, China;
4. Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi Province 712100, China;
5. Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Yangling, Shaanxi Province 712100, China

Received:2014-10-27 Revised:2015-03-09 Online:2015-12-15 Published:2016-02-01

渭北旱塬区不同年限苜蓿对土壤主要养分及微生物量的影响

张宝泉¹, 李红红², 马虎³, 程积民^1,2,4,5, 金晶炜^4,5, 朱仁斌¹, 程光庆²

1. 西北农林科技大学资源与环境学院, 陕西杨凌 712100;
2. 西北农林科技大学动物科技学院, 陕西杨凌 712100;
3. 宁夏农村能源工作站, 宁夏银川 750002;
4. 西北农林科技大学水土保持研究所, 陕西杨凌 712100;
5. 中国科学院水利部水土保持研究所, 陕西杨凌 712100

通讯作者: 程积民
作者简介:张宝泉(1989-),男,山西临汾人,硕士研究生,主要从事土壤学与恢复生态学研究,E-mail:1036811903@qq.com
基金资助:
农业部“现代农业产业技术体系建设专项”(CARS-35-40);国家自然科学基金重点项目(41230852);中国科学院人才培养计划项目(K318021220);陕西省自然科学基金(2013JQ3013);中央高校基本科研业务费专项资金(Z109021306);西北农林科技大学博士科研启动基金项目(Z109021108)资助

Abstract

Abstract:

The soil nutrients and soil microbial biomass of artificial Medicago sativa grasslands at 6, 11, 16, 21 years were analyzed in the arid area of Northern Weihe river basin with the nature grassland as control. The results showed that planting Medicago sativa could significantly improve the soil quality (P<0.05). The soil organic carbon, total nitrogen, total phosphorus, microbial biomass C and microbial biomass N all increased firstly and then decreased, and the highest point happened at the 11th year. The correlation analyses showed that there was some correlation between the soil nutrients and the microbial biomass, and the extent was different. These results indicated that the microbial biomass was more sensitive to the changes of soil quality than the soil nutrients. Therefore, the artificial Medicago sativa grassland needed rational utilization and some human intervention for prolonging the service life of the grassland after 11 years in the arid area of Northern Weihe river basin.

Key words: Arid area of Northern Weihe river basin, Artificial Medicago sativa grassland, Different years, Microbial biomass, Soil quality

摘要：

以渭北旱塬区生长年限为6年、11年、16年和21年的紫花苜蓿(Medicago sativa)人工草地为研究对象,天然草地为对照,通过研究土壤主要养分及微生物生物量的变化特征来揭示紫花苜蓿人工草地生长年限对渭北旱塬区土壤质量的影响。结果表明,种植紫花苜蓿能够显著改善土壤有机质、全氮、全磷及土壤微生物量C和N(P<0.05),且随种植年限的延长均呈先升后降的趋势,最高点出现在第11年。相关性分析表明,土壤养分与微生物生物量存在一定的相关性,而且微生物生物量可以更灵敏地反映土壤质量变化。综合考虑,渭北旱塬区紫花苜蓿人工草地在恢复11年后应当进行合理利用或进行其他人工干预以延长草地使用寿命。

关键词: 渭北旱塬区, 紫花苜蓿人工草地, 不同年限, 微生物量, 土壤质量

CLC Number:

S153.6

ZHANG Bao-quan, LI Hong-hong, MA Hu, CHENG Ji-min, JIN Jing-wei, ZHU Ren-bin, CHENG Guang-qing. Effects of Medicago sativa on Soil Nutrients and Microbial Biomass under Different Years in the Arid Area of Northern Weihe River Basin[J]. Acta Agrestia Sinica, 2015, 23(6): 1190-1196.

张宝泉, 李红红, 马虎, 程积民, 金晶炜, 朱仁斌, 程光庆. 渭北旱塬区不同年限苜蓿对土壤主要养分及微生物量的影响[J]. 草地学报, 2015, 23(6): 1190-1196.

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Effects of Medicago sativa on Soil Nutrients and Microbial Biomass under Different Years in the Arid Area of Northern Weihe River Basin

渭北旱塬区不同年限苜蓿对土壤主要养分及微生物量的影响

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