Response of soil moisture and water use efficiency to straw mulching amount and mulching period in black soil zone of northeast China

IF 1.5 4区农林科学 Q4 SOIL SCIENCE Canadian Journal of Soil Science Pub Date : 2023-07-26 DOI:10.1139/cjss-2023-0018

Jilong Liu, Qianqian Liu, Jiawen Li, Lingling Zhang, Xiaoqiang Cao, Jizhen Li, Ran Cao, Hang Lv, Zhizhuo Wang, Z. Dong

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Abstract

Abstract To reveal the mechanisms of straw mulching amounts and mulching periods on soil moisture in the black soil zone of Northeast China. Three types of straw mulching (0.4, 0.8, and 1.2 kg/m2) and two mulching periods (sowing stage and three-leaf stage) were set up as interactive experiments, and no straw mulching was used as the control (CK) to analyze the response mechanisms of soil moisture content, water consumption, and water use efficiency to straw mulching periods and mulching amounts at different depths. The results showed that straw mulching improved the moisture storage capacity compared with no straw mulching, and the straw mulching rate of 0.8 kg/m2 at the three-leaf stage improved the moisture storage capacity and reduced the water consumption capacity compared with the straw mulching at the sowing stage, CK and other straw mulching treatments at the three-leaf stage; the crop yield and water use efficiency increased and then decreased with the increase of straw mulching. The increase of crop yield and water use efficiency under the straw mulching treatments at the three-leaf stage was higher than that under the same straw mulching treatments at the sowing stage. The analysis of the dual effects of straw mulching amounts and mulching periods on moisture gain and loss showed that the straw mulching amounts of 0.8 kg/m2 at the three-leaf stage had the best effect on soil moisture characteristics and water use efficiency.

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东北黑土区土壤水分利用效率对秸秆覆盖量和覆盖期的响应

揭示秸秆覆盖量和覆盖周期对东北黑土区土壤水分的影响机制。设置3种秸秆覆盖方式(0.4 kg/m2、0.8 kg/m2、1.2 kg/m2)和2个覆盖时段(播期和三叶期)作为交互试验，以不覆盖秸秆为对照(CK)，分析不同深度土壤含水量、耗水量和水分利用效率对秸秆覆盖时段和覆盖量的响应机制。结果表明:与不覆盖相比，秸秆覆盖提高了土壤的蓄水能力，三叶期秸秆覆盖0.8 kg/m2较播期秸秆覆盖、CK等三叶期秸秆覆盖处理提高了土壤的蓄水能力，降低了土壤的耗水能力;作物产量和水分利用效率随秸秆覆盖量的增加先上升后下降。三叶期秸秆覆盖处理对作物产量和水分利用效率的提高高于播种期秸秆覆盖处理。秸秆覆盖量和覆盖周期对土壤水分增减的双重效应分析表明，三叶期秸秆覆盖量为0.8 kg/m2对土壤水分特性和水分利用效率的影响最佳。

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来源期刊

Canadian Journal of Soil Science 农林科学-土壤科学

CiteScore

2.90

自引率

11.80%

发文量

审稿时长

6.0 months

期刊介绍： The Canadian Journal of Soil Science is an international peer-reviewed journal published in cooperation with the Canadian Society of Soil Science. The journal publishes original research on the use, management, structure and development of soils and draws from the disciplines of soil science, agrometeorology, ecology, agricultural engineering, environmental science, hydrology, forestry, geology, geography and climatology. Research is published in a number of topic sections including: agrometeorology; ecology, biological processes and plant interactions; composition and chemical processes; physical processes and interfaces; genesis, landscape processes and relationships; contamination and environmental stewardship; and management for agricultural, forestry and urban uses.