【摘要】：在遼河平原中西部設(shè)兩年定點試驗,研究秸稈還田方式對土壤理化性質(zhì)及玉米產(chǎn)量的影響。結(jié)果表明,條帶旋耕后10~20 cm土層土壤緊實度顯著下降,0~40 cm(2016)土壤容重減小、總孔隙度增加;條帶旋耕明顯增加了豐水年(2016)玉米產(chǎn)量。秸稈還田顯著增加10~20 cm土層土壤速效養(yǎng)分含量、提高土壤有機質(zhì)含量,降低0~30 cm土層土壤容重、增加其總孔隙度。秸稈還田改善土壤理化性質(zhì),顯著提高玉米產(chǎn)量,干旱年(2015)條帶旋耕增產(chǎn)效果最突出。秸稈條帶旋耕還田提高土壤通透性、改善土壤結(jié)構(gòu)、增強土壤抗旱能力、提高作物產(chǎn)量,是適宜推廣的秸稈還田和耕作組合方式。
[Abstract]:A two year fixed-point experiment was conducted in the middle and west of Liaohe Plain to study the effect of straw return on soil physical and chemical properties and maize yield. The results showed that the soil compactness of 10 ~ 20 cm soil layer decreased significantly, the bulk density of 0 ~ 40 cm (2016) soil decreased, and the total porosity increased, while strip rotary tillage significantly increased (2016) maize yield in a water-rich year. Straw returning to the field significantly increased the content of soil available nutrients, increased the content of soil organic matter, reduced the bulk density of 0 ~ 30 cm soil layer, and increased the total porosity of the soil layer for 10 ~ 20 cm. Straw returning to the field improved soil physical and chemical properties and significantly increased maize yield. In drought year (2015), the effect of rotary tillage was the most outstanding. It is a suitable combination of straw returning and tillage to improve soil permeability, improve soil structure, strengthen soil drought resistance and increase crop yield.
【作者單位】： 沈陽農(nóng)業(yè)大學(xué)農(nóng)學(xué)院;遼寧省農(nóng)業(yè)機械化研究所;
【基金】：國家重點研發(fā)計劃項目(2016YFD0300801,2016YFD0300103,2017YFD0201805,2017YFD0300703) 公益性行業(yè)(農(nóng)業(yè))科研專項經(jīng)費項目(201503116)
【分類號】：S141.4;S513

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