Acta Agrestia Sinica ›› 2018, Vol. 26 ›› Issue (5): 1150-1158.DOI: 10.11733/j.issn.1007-0435.2018.05.017

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Effect of Fertilizer and Mixture on the Oat Cultivation Grassland Plant Carbon Storage on Alpine Plateau

LIU Wen-hui, LIU Yong, MA Xiang, WEI Xiao-xing   

  1. Key Laboratory of Superior Forage Germplasm in the Qinghai-Tibetan Plateau, Qinghai Academy of Animal Science and Veterinary Medicine, Xining, Qinghai Province 810016, China
  • Received:2018-06-11 Revised:2018-09-20 Online:2018-10-15 Published:2018-11-06

高寒区施肥和混播对燕麦人工草地生物碳储量影响的研究

刘文辉, 刘勇, 马祥, 魏小星   

  1. 青海省青藏高原优良牧草种质资源利用重点实验室, 青海大学畜牧兽医科学院, 青海 西宁 810016
  • 通讯作者: 刘勇
  • 作者简介:刘文辉(1979-),男,青海贵德人,副研究员,E-mail:qhliuwenhui@163.com
  • 基金资助:
    青海省科技厅重点实验室发展专项“青海省青藏高原优良牧草种质资源利用重点实验室”(2017-ZJ-Y12);“现代农业产业技术体系建设专项资金”(CARS-34);农业部“牧草种质资源保护项目”(2130135);青海省饲草产业科技创新平台资助

Abstract: To reveal the effect of oat variety,fertilizer and legume mixture on the plant carbon storage and allocation pattern,we carried out an experiment with four oats varieties (A1:Avena sativa cv. Qingyan No.1,A2:A. sativa cv. Lena,A3:A. sativa cv. Qinghai 444,A4:A. sativa cv. Qinghai),four levels of nutrient addition (B1:No addition CK0;B2:urea 75 kg·hm-2+ diammonium phosphate 150 kg·hm-2,IM;B3:organic fertilizer 1 500 kg·hm-2,OM;B4:urea 75 kg·hm-2 + diammonium phosphate 150 kg·hm-2+ organic fertilizer 1 500 kg·hm-2 IM+OM) and four legume mixture levels (C1:0 kg·hm-2;C2:45 kg·hm-2;C3:60 kg·hm-2;C4:75 kg·hm-2). As the results showed,the variety,fertilizer and legume mixture all significantly affect the oat grassland plant carbon stock. The variety played a main role in the oat stem,ear and root carbon storage,the fertilizer influenced the oat leaf carbon and legume root carbon storage,and the legume mixture took a great part in legume stem and leaf carbon storage. Under these three different agronomy procedure,the total plant carbon ranged from 1 707.70~2 470.15 kg·hm-2. For the A. sativa cv. Qinghai,urea,diammonium phosphate and organic fertilizer treatments got a higher above-and below-ground plant carbon storage(2 204.7 kg·hm-2,265.4 kg·hm-2 and 2 136.4 kg·hm-2;247.4 kg·hm-2,75 kg·hm-2 and 60 kg·hm-2). With the legume mixture,the above and below-ground was 2 008.0 kg·hm-2and 250.3 kg·hm-2. The carbon allocation of different plant organs increased along with the growth period and got the peak value at milk stage. The carbon storage of the above-ground oat increased greatly during the heading period to flowering,but the legume increased from florescence to milk period.

Key words: Alpine area, Variety, Fertilizer, Legume mixed sowing, Plant carbon storage

摘要: 采用三因素四水平正交试验设计[L16(45)],研究了燕麦品种、施肥和箭筈豌豆混播对燕麦人工草地生物碳储量影响的研究,为燕麦人工草地生态评价提供理论依据。结果表明,品种、施肥和混播均显著影响燕麦草地生物碳储量,品种主要影响燕麦茎、穗和根生物碳储量,施肥主要影响燕麦叶生物碳和箭筈豌豆根生物碳储量;混播主要影响箭筈豌豆茎、叶生物碳储量。燕麦人工草地总碳储量为1 707.70~2 470.15 kg·hm-2,其中利用青海甜燕麦和采用尿素+磷酸二铵+有机肥施肥处理,箭筈豌豆混播75 kg·hm-2或60 kg·hm-2时建植燕麦人工草地地上、地下总生物碳储量均表现较高,其地上总生物碳储量分别为2 204.7 kg·hm-2,2 136.4 kg·hm-2和2 008.0 kg·hm-2,地下总生物碳储量分别为265.4 kg·hm-2,247.4 kg·hm-2和250.3 kg·hm-2。各器官碳储量及群落总生物碳储量均随生育期的推进显著增加,在乳熟期达到最大。燕麦和箭筈豌豆地上总生物碳储量分别在燕麦抽穗期—开花期和开花—乳熟期增长迅速。

关键词: 高寒区, 品种, 施肥, 豆科混播, 生物碳储量

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