滨海盐碱地棉花秸秆还田对土壤理化性质及棉花产量的影响
发布时间:2019-05-09 18:52
【摘要】:在滨海盐碱地定点设置连续3年棉花秸秆还田和未还田2个处理,研究其对0~60 cm土层土壤理化性质和棉花产量的影响。结果表明,连续3年棉花秸秆还田显著降低0~30 cm土层土壤容重和0~10 cm土层0.25 mm土壤微团聚体含量;显著提高0~10 cm土层5 mm土壤大团聚体含量。在0~20 cm土层,3年秸秆还田显著提高棉花播前和各生育阶段土壤有机质、硝态氮、铵态氮和速效钾含量,平均分别比对照提高13.45%、18.57%、22.80%和22.57%;降低土壤速效磷和含盐量,平均分别比对照降低18.29%和16.59%。在20~40 cm土层,3年秸秆还田显著提高土壤硝态氮和铵态氮含量,平均比对照提高37.20%和31.62%;显著降低土壤含盐量,平均比对照降低19.06%。在40~60 cm土层,3年秸秆还田显著提高土壤硝态氮和铵态氮含量,平均分别比对照提高38.26%和24.83%。3年棉花秸秆还田分别比未还田显著提高棉花籽棉产量11.57%、19.01%和13.24%和皮棉产量18.56%、19.78%和18.73%,但对棉花单铃重和衣分无显著影响。
[Abstract]:Two treatments of cotton straw returning and not returning to the field for 3 consecutive years were set up in coastal saline-alkali site for 3 years to study the effects of cotton straw returning and unreturned treatments on soil physical and chemical properties and cotton yield in 0 / 60 cm soil layer. The results showed that the soil bulk density of 0 鈮,
本文编号:2473000
[Abstract]:Two treatments of cotton straw returning and not returning to the field for 3 consecutive years were set up in coastal saline-alkali site for 3 years to study the effects of cotton straw returning and unreturned treatments on soil physical and chemical properties and cotton yield in 0 / 60 cm soil layer. The results showed that the soil bulk density of 0 鈮,
本文编号:2473000
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