期刊
AGRONOMY-BASEL
卷 13, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/agronomy13030707
关键词
salt stress; deep straw returning; soil; maize chlorophyll fluorescence; maize yield
This study investigated the effects of different tillage methods on soil improvement and maize growth in cropland with varying degrees of salinization. The results showed that deep straw return significantly improved soil nutrients and reduced salinity levels, leading to better growth and higher yield of maize, especially in moderately saline-alkali land.
To clarify the effect of tillage methods on saline-alkali land improvement and maize growth in cropland salinized to different degrees, we set up two treatments (shallow rotation (15 cm depth; CK) and deep straw return (35 cm depth; DPR)) in land characterized by three different salinization degrees and analyzed the effects of the two treatments on soil nutrient content, salinity index, chlorophyll fluorescence, growth status, and yield at three salinization levels. The results show that (1) compared with CK, alkaline N, total N, Olsen P, exchangeable K, and organic matter in saline soils were all significantly improved, and total salt and pH values were reduced by 34.01-50.79% and 2.56-7.54%, respectively, under deep straw return conditions, representing the largest values in moderately saline-alkali land. (2) Compared with CK, chlorophyll fluorescence was significantly improved, and maximum photochemical efficiency (Fv/Fm), photochemical quenching (qP), and effective quantum yield of PSII (phi PSII) were significantly increased by 8.09-15.41%, 9.13-17.93%, and 38.79-70.83% following deep straw return treatment; these increases were the largest ones observed in moderately saline-alkali land. (3) Deep straw return promoted the growth of maize and significantly increased the yield of maize. Plant height, leaf area index, and yield increased the most in moderately saline-alkali land and increased by 6.84-21.79%, 0.59-2.28 units, and 12.78-28.07%, respectively. The yield increased by 33.89 %, which was mainly due to the increase in 1000-grain weight. The results provide a theoretical basis for taking straw return measures to improve soil and increase maize yield in saline-alkali land.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据