连年耕作与秸秆还田对土壤养分和玉米产量的影响

doi:10.12190/j.issn.2096-1197.2024.01.03

Abstract

Abstract: 【Objective】Clarify the effects of continuous tillage and straw returning on soil nutrients and maize yield,to provide references for the improvement of maize yield.【Methods】Four treatments including subsoiling with straw returning（ST_S）,subsoiling （ST₀）,no-tillage with straw returning （NT_S） and no-tillage （NT₀） were set up. Soil samples were collected from 0-100 cm soil layer at maize maturity stage,and tested for soil nitrogen content,nitrogen storage,polysaccharide content,fulvic acid content,humic acid content,aggregate relative content and mean weight diameter,as well as aggregate nitrogen content. Maize yield was tested as well to analyze the effects of continuous tillage and straw returning on soil nutrient content and maize yield.【Results】ST_S significantly increased the soil nitrogen content and nitrogen storage in 0-20 cm soil layer by 96.19% and 89.35% compared with NT₀. In the 20-100 cm soil layer,ST_S soil nitrogen content were higher,with a 13.13% increase compared with NT₀. ST_S significantly increased 20-100 cm soil layer nitrogen storage by 29.20% compared with NT₀. ST_S increased 0-40 cm soil layer polysaccharide,fulvic acid and humic acid content by 17.45%,62.66%,and 10.63% compared with NT₀. In 0-40 cm soil layer,ST_S significantly increased 2-1 mm and <0.053 mm aggregate relative contents by 41.92% and 336.42% compared with NT₀. Nitrogen content of aggregates at >1 mm and <0.053 mm in the soil were highest,increased by 14.46% and 6.86% compared with NT₀. ST_S improved maize yield by 8.29% compared with NT₀.【Conclusion】Subsoiling with straw returning was more conducive to increasing the continuous tillage and straw returning nitrogen content in 0-20 cm soil layer,the contents of polysaccharide,fulvic acid and humic acid in 0-40 cm soil layer,and promoting the formation of larger aggregates,thus increased maize yield.

Key words: Continuous tillage, Straw returning, Soil nutrients, Aggregate, Maize, Yield

CLC Number:

S158.3

LYU Jinling, LIU Zhen, WANG Ning, SHEN Ying, YANG Qian, LI Geng, NING Tangyuan. Effects of continuous tillage and straw returning on soil nutrients and maize yield[J].Journal of Northern Agriculture, 2024, 52(1): 16-25.

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Effects of continuous tillage and straw returning on soil nutrients and maize yield

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