作物学报Issue(10)：1797-1807,11.DOI:10.3724/SP.J.1006.2014.01797
耕作方式与秸秆还田对冬小麦-夏玉米轮作系统中干物质生产和水分利用效率的影响
Effects of Tillage and Straw Returning on Biomass and Water Use Efficiency in a Winter Wheat and Summer Maize Rotation System
摘要
Abstract
Straw returning to the field has been carried out in the Huang-Huai-Hai River Plain for ten years. In a consecutive two-year field experiment from 2010 to 2012, the effects of conventional tillage (CT), deep tillage (DT) and subsoiling (SS) on dry matter accumulation and water use efficiency were tested in a winter wheat-summer maize rotation system for setting up a tillage practice suitable for straw returning. The results were obtained from the comparison among six treatments, including CT+AS (all straw returning), CT+NS (no straw returning), DT+AS, DT+NS, SS+AS, and SS+NS. Under straw returning condi-tion, either DT or SS practice increased water consumption amount during winter wheat or summer maize growth period but de-creased it during fallow period. In addition, relative water content, net photosynthetic rate (Pn), transpiration rate (Tr) of leaf, and bleeding sap in stalk were also increased in both crops, leading to more biomass and higher water use efficiency together with increased grain yields in winter wheat and summer maize seasons. The effects of interactions between soil tillage (DT or SS) and straw returning on dry matter accumulation and water use efficiency were significant in both crops. Compared with conventional tillage under no straw returning, DT and SS under straw retuning resulted in increased dry matter accumulation (by 19.3%and 22.9%, respectively), annual crop yield (by 18.0%and 19.3%, respectively), and water use efficiency (by 15.9%and 15.1%, re-spectively). The difference of the effect between DT and SS under straw returning was not significant. Therefore, we recommend DT or SS practice in straw returning field under the environment similar to that of this experiment.关键词
耕作方式/秸秆还田/土壤耗水量/籽粒产量/水分利用效率Key words
Tillage/Straw returning/Soil water consumption/Grain yield/Water use efficiency引用本文复制引用
赵亚丽,郭海斌,薛志伟,穆心愿,李潮海..耕作方式与秸秆还田对冬小麦-夏玉米轮作系统中干物质生产和水分利用效率的影响[J].作物学报,2014,(10):1797-1807,11.基金项目
本研究由国家自然科学基金项目(31301261),国家现代农业产业技术体系建设专项(CARS-02-19),国家公益性行业(农业)科研专项(201203100)和中国博士后科学基金项目(20100480853)资助。 （31301261）
