【摘要】 通过8年的田间定位试验,研究了不同耕作方法及有机肥用量对春玉米产量和土壤理化性状的影响。结果表明,连年深松能显著降低10~20 cm和20~30 cm土壤体积质量,施用有机肥30 000 kg/hm~2以上能显著降低10~20 cm土壤体积质量;深松导致耕层土壤有机质、全氮和全磷含量呈下降趋势,碱解氮和速效磷略有增加;耕层土壤有机质、全氮、碱解氮和速效磷含量随有机肥用量的增加而显著增加,全磷、全钾和速效钾含量增加幅度与有机肥用量无关;深松和施用有机肥均能显著增加玉米产量,施用有机肥的增产效果好于深松,但其增产速率随有机肥用量增加而降低。连年深松对改善土壤理化性质和提高玉米产量的效果好于隔年深松,且在施用有机肥的条件下效果更好。更多还原

【Abstract】 A 8-year located field plot experiment was conducted to study the influences of different tillage methods and application of organic manure on the yield of spring maize and physical and chemical properties of soil. The results showed that compared with the tillage method of normal plowing, continuous subsoiling decreased the soil bulk density remarkable in 10– 20 cm and 20–30 cm soil layer, particularly in 10–20 cm with the application of organic fertilizer more than 30 000 kg/hm~2. Continuous subsoiling increased available N and P contents, but reduced soil organic matter, total N and total P contents in the surface soil. The contents of organic matter, Total N, available N and available P increased with the increasing application of organic fertilizer while the increase of total P, total K and available K contents was not affected by the application of organic manure. Organic manure showed better than continuous subsoiling in increasing maize yield, but the yield-increase rate was reduced with the increasing application of organic manure. Continuous subsoiling showed better in improving soil physical and chemical properties and increasing maize yield than biennial subsoiling, particularly with the application of organic fertilizer.更多还原