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研究了不同秸秆还田量对免耕黑土速效养分含量和玉米产量的影响。结果表明:秸秆还田可以增加土壤表层(0～10cm)碱解氮、速效磷和速效钾含量,以5000kg/hm2秸秆还田处理效果最为明显。研究同时发现,玉米产量与碱解氮含量呈显著的相关性(P<0.05)。
The effect of different straw returning amount on available nutrient content and corn yield in no-till black soil was studied. The results showed that straw returning to field could increase the content of available nitrogen, available phosphorus and available potassium in the soil surface (0 ~ 10cm), and the effect of applying straw with 5000kg / hm2 was the most obvious. The study also found that there was a significant correlation between corn yield and alkali-hydrolyzable nitrogen content (P <0.05).