增水和施肥对苜蓿—小麦轮作系统冬小麦生物量的影响

doi:10.11733/j.issn.1007-0435.2020.03.030

草地学报 ›› 2020, Vol. 28 ›› Issue (3): 828-834.DOI: 10.11733/j.issn.1007-0435.2020.03.030

增水和施肥对苜蓿—小麦轮作系统冬小麦生物量的影响

张晓琳^1,2, 翟鹏辉¹, 赵祥¹, 董宽虎¹, 朱慧森¹

1. 山西农业大学, 山西太谷 030801;
2. 兰州大学生命科学学院草地农业生态系统国家重点实验室, 甘肃兰州 730000

收稿日期:2019-12-23 修回日期:2020-01-28 出版日期:2020-06-15 发布日期:2020-05-30
通讯作者: 董宽虎
作者简介:张晓琳(1987-),女,山东淄博人,博士,副教授,主要从事草地生态系统生态学研究,E-mail:alleenzhang@126.com;
基金资助:
兰州大学草地农业生态系统国家重点实验室开放性课题（SKLGAE201604）；山西农业大学科技创新项目（2017YJ11）共同资助

Effects of Water and Fertilization Addition on Aboveground Biomass of Winter Wheat in the Alfalfa-Winter Wheat Rotation System

ZHANG Xiao-lin^1,2, ZHAI Peng-hui¹, ZHAO Xiang¹, DONG Kuan-hu¹, ZHU Hui-sen¹

1. Shanxi Agricultural University, Taigu, Shanxi Province 030801, China;
2. State Key Laboratory of Grassland Agro-ecosystems, Lanzhou University, Lanzhou, Gansu Province 730020, China

Received:2019-12-23 Revised:2020-01-28 Online:2020-06-15 Published:2020-05-30

摘要/Abstract

摘要： 为探究水肥对草田轮作系统作物生物量的影响，本研究利用山西农业大学动物科技学院试验站紫花苜蓿（Medicago sativa L.）-小麦（Triticum aestivum L.）轮作系统，开展增水（适量补水）和施肥（N 225 kg·hm^-2和P₂O₅ 150 kg·hm^-2）处理的控制试验，动态监测冬小麦生物量和土壤含水量等指标。结果表明：增水处理下，2018年冬小麦生物量提高41.0%（P<0.001），但在2017年不显著；施肥处理下，2017年和2018年冬小麦生物量分别提高62.0%和50.4%（P<0.001）。本研究显示增水和施肥通过调控土壤含水量、叶片叶绿素含量和光合作用速率来改变冬小麦对碳的积累，从而影响冬小麦生物量；冬小麦返青后，随着时间的推进施肥作用减弱。本研究结果说明将紫花苜蓿引入冬小麦的轮作系统有减肥增效以及改善生态环境的作用。

关键词: 紫花苜蓿, 生物量, 施肥, 增水, 冬小麦

Abstract: To explore the effects of water and fertilizer addition on wheat biomass in the alfalfa-wheat rotation system,we conducted the experiment in the experiment station of the college of animal science and veterinary medicine,Shanxi Agricultural University,where the winter wheat was sown in 2017 and 2018 after planting alfalfa for 3 years. We carried out water and fertilization addition experiments with water addition for 5 times,and the fertilization addition amounts were 225 kg N·hm^-2 and 150 kg P₂O₅·hm^-2. The results showed that water addition significantly increased winter wheat biomass by 41.0% in 2018,but had no significant effect on it in 2017. Fertilization addition significantly increased winter wheat biomass by 62.0% in 2017 and 50.4% in 2018. The results showed that water and fertilization addition regulated soil moisture,leaf chlorophyll content and photosynthetic rate so that it affected the biomass of winter wheat by influencing the carbon accumulation in winter wheat. In addition,the study found that fertilization effect on winter wheat biomass became weakened following time after its returning green stage. It indicated that introducing alfalfa into winter wheat rotation system could reduce the application of chemical fertilizer by biological means,and then improve the environment.

Key words: Alfalfa, Biomass, Fertilizer addition, Water addition, Winter wheat

中图分类号:

S963.22+3.3

张晓琳, 翟鹏辉, 赵祥, 董宽虎, 朱慧森. 增水和施肥对苜蓿—小麦轮作系统冬小麦生物量的影响[J]. 草地学报, 2020, 28(3): 828-834.

ZHANG Xiao-lin, ZHAI Peng-hui, ZHAO Xiang, DONG Kuan-hu, ZHU Hui-sen. Effects of Water and Fertilization Addition on Aboveground Biomass of Winter Wheat in the Alfalfa-Winter Wheat Rotation System[J]. Acta Agrestia Sinica, 2020, 28(3): 828-834.

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增水和施肥对苜蓿—小麦轮作系统冬小麦生物量的影响

Effects of Water and Fertilization Addition on Aboveground Biomass of Winter Wheat in the Alfalfa-Winter Wheat Rotation System

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