摘要
采用2年试验数据分析了免耕对冬小麦不同生育时期土壤剖面水分、可溶性碳和硝态氮变化动态的影响。结果表明,免耕较传统耕作均不同程度地增加了冬小麦拔节期、扬花期、灌浆期和成熟期0~100 cm土层土壤平均含水量,且冬小麦关键生育时期土壤水分均随土壤深度增加而呈现先减少后增加的趋势。与传统耕作相比,免耕分别提高冬小麦拔节期和扬花期0~40 cm土层平均含水量14.0%和10.3%;在冬小麦拔节期和灌浆期,免耕较传统耕作分别提高了土壤剖面0~100 cm平均硝态氮含量43.1%和5.7%。与传统耕作相比,免耕不仅降低了冬小麦全生育期土壤剖面0~100 cm平均可溶性碳含量2.0%,而且降低了冬小麦拔节期、灌浆期和成熟期土层0~40 cm可溶性碳含量。
The effects of no-till framing treatment on soil water,soil dissolved organic carbon and nitrate nitrogen of winter wheat in different growth stages were analyzed by using 2 years’data.The results showed that no-tillage treatment more or less increased the average water content in 0-100 cm soil layer during the jointing,flowering,filling and harvest stages,but it was decreased in depth layer of soil during the key growing stages of winter wheat.Compared with the conventional tillage treatment,no-tillage treatment could increase the average water content in 0-40 cm soil layer by 14.0%and 10.3%at jointing and flowering stages,respectively,while the average nitrate nitrogen contents in 0-100 cm soil layer were increased by 43.1%and 5.5%under no-tillage treatment,respectively.Furthermore,no-tillage treatment not only induced the decline of average dissolved organic carbon content in 0-100 cm soil layer by 2.0%at the whole growing stage,but also reduced the values of dissolved organic carbon in 0-40 cm soil layer during the jointing,filling and maturity stages.
作者
丁晋利
魏红义
武继承
杨永辉
DING Jinli;WEI Hongyi;WU Jicheng;YANG Yonghui(Zhengzhou Normal University,Zhengzhou 450044,China;Key Lab for Crop Water Requirement and Regulation of Ministry of Agriculture,Farmland Irrigation Research Institute, Chinese Academy of Agriculture Sciences, Xinxiang 453000,China;Henan Branch of Construction and Administration Bureau of South-to-North Water Diversion Middle Route Project Zhengzhou 450018,China;Institute of Plant Nutrition and Resource & Environmental Science, Henan Academy of Agricultural Sciences,Zhengzhou 450002,China)
出处
《河南农业大学学报》
CAS
CSCD
北大核心
2020年第2期326-331,共6页
Journal of Henan Agricultural University
基金
中央公益性科研机构基础研究基金项目(中国农业科学院农田灌溉研究所FIRI2019-03-0201)
国家重点研发计划项目(2017YFD0301102)。
关键词
冬小麦
免耕
传统耕作
土壤水分
可溶性碳
硝态氮
winter wheat
no-tillage
conventional tillage
soil water
dissolved organic carbon
soil nitrate nitrogen
