濱海鹽堿地棉花秸稈還田對土壤理化性質(zhì)及棉花產(chǎn)量的影響
發(fā)布時間:2019-05-09 18:52
【摘要】:在濱海鹽堿地定點設(shè)置連續(xù)3年棉花秸稈還田和未還田2個處理,研究其對0~60 cm土層土壤理化性質(zhì)和棉花產(chǎn)量的影響。結(jié)果表明,連續(xù)3年棉花秸稈還田顯著降低0~30 cm土層土壤容重和0~10 cm土層0.25 mm土壤微團聚體含量;顯著提高0~10 cm土層5 mm土壤大團聚體含量。在0~20 cm土層,3年秸稈還田顯著提高棉花播前和各生育階段土壤有機質(zhì)、硝態(tài)氮、銨態(tài)氮和速效鉀含量,平均分別比對照提高13.45%、18.57%、22.80%和22.57%;降低土壤速效磷和含鹽量,平均分別比對照降低18.29%和16.59%。在20~40 cm土層,3年秸稈還田顯著提高土壤硝態(tài)氮和銨態(tài)氮含量,平均比對照提高37.20%和31.62%;顯著降低土壤含鹽量,平均比對照降低19.06%。在40~60 cm土層,3年秸稈還田顯著提高土壤硝態(tài)氮和銨態(tài)氮含量,平均分別比對照提高38.26%和24.83%。3年棉花秸稈還田分別比未還田顯著提高棉花籽棉產(chǎn)量11.57%、19.01%和13.24%和皮棉產(chǎn)量18.56%、19.78%和18.73%,但對棉花單鈴重和衣分無顯著影響。
[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,
本文編號: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,
本文編號:2473000
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