不同秸秆还田方式对滨海盐渍土水盐运动的影响

发布时间：2018-05-18 23:42

本文选题：秸秆还田 + 土壤水分　；参考：《水土保持研究》2017年06期

【摘要】：为了探究不同秸秆还田方式对滨海盐渍土水盐调控机制,设置4种处理方式:秸秆覆盖(P),秸秆深埋(S),秸秆覆盖+深埋(T),常规耕作(CK),以CK为对照,通过大田试验研究不同处理下冬小麦生育期内土壤水盐运动及其对冬小麦产量的影响。结果表明:秸秆还田增加了土壤储水量,P,S和T处理0—70cm土层生育期储水量均值高于CK处理8.28mm,6.86mm和13.76mm;冬小麦前中期对0—30cm土层保墒效果明显,随生育期的推移各处理间差异及土壤含水率均逐渐减小。秸秆还田抑制了土壤盐分表聚,T处理可显著降低0—50cm土层土壤含盐量,生育期含盐量均值低于P,S和CK处理41.24%,32.08%和52.77%,淡化土壤耕层效果明显;S处理对0—30cm土层脱盐效果优于P处理。秸秆还田改善土壤水盐状况,显著增加了冬小麦产量,产量表现出TPSCK的顺序。T处理改善土壤水盐状况和提高产量表现较优,为试验的最佳处理方式。
[Abstract]:In order to explore the mechanism of controlling water and salt in coastal saline soil by different straw returning methods, four treatment methods were set up: straw mulching, straw deep burying, straw mulching, conventional tillage, CK as control. The effects of soil water and salt on winter wheat yield under different treatments were studied by field experiments. The results showed that the average value of soil water storage in 0-70cm soil layer under straw application was higher than that in CK treatment (8.28 mm, 6.86 mm and 13.76 mm), and the effect of winter wheat on 0-30cm soil moisture conservation was obvious in the first and middle stages of winter wheat treatment. The difference between treatments and soil moisture content decreased gradually with the growth period. Straw returning to the field could significantly reduce the salt content in 0-50cm soil layer. The average value of salt content in growth period was lower than that of PNS and CK treatments (41.240.08% and 52.77%), and the effect of desalination of soil tillage layer was obviously better than that of P treatment in 0-30cm soil layer desalination. Straw returning to the field to improve soil water and salt status significantly increased the yield of winter wheat. The yield showed the order of TPSCK. T treatment improved soil water and salt status and improved yield better, which was the best treatment method in the experiment.
【作者单位】：山东农业大学资源与环境学院土肥资源高效利用国家工程实验室;
【基金】：山东省自主创新及成果转化专项“黄河三角洲盐碱地快速改良技术研发集成与示范”(2014ZZCX07402) 山东农业大学盐碱地改良利用项目“黄河三角洲盐渍土秸秆控盐关键技术研究”(2014208)
【分类号】：S141.4;S156.4

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