化肥减量配施有机肥对稻田肥力与养分吸收的影响

Effects of Chemical Fertilizer Reduction Combined with Manure Application on Soil Fertility and Nutrient Absorption in Paddy Fields

为了达到培肥土壤、化肥减量增效和持续丰产的目标,在不同肥力水平稻田中开展了化肥减量配施有机肥对水稻(中稻)产量、土壤肥力和化肥利用率影响的研究。结果表明:各试验点化肥减量配施有机肥可明显提高水稻的产量,培肥地力,与常规施化肥处理相比水稻产量提高2.1%~3.8%,平均提高2.7%;与试验前相比,马回岭低、马回岭中和新城镇试验点的土壤有机质含量分别增加0.6、0.6和0.5 g/kg;土壤速效氮磷钾含量比试验前和常规施化肥处理均有明显增加,且氮磷钾利用率均明显提高,各试验点的平均氮磷钾利用率分别为52.3%、28.3%和60.4%,分别比常规施化肥处理的平均值高16.8、8.9和12.9个百分点。

The test of fertilizer reduction combined with manure application in mid-season rice was carried out in the paddy fields with different fertility,with a view to improving soil fertility and crop yield with reduced fertilizer application.The rice yield,soil fertility,and fertilizer utilization rate were analyzed.The results showed that chemical fertilizer reduction combined with manure application increased the rice yield by 2.1%–3.8%(2.7%on average)compared with the conventional fertilizer treatment.Compared with that before the test,chemical fertilizer reduction combined with manure application increased the soil organic matter by 0.6,0.6,and 0.5 g/kg at Mahuiling sites(low fertility and middle fertility)and Xincheng Town,respectively.Furthermore,the average utilization rates of N,P and K fertilizer at the three sites with chemical fertilizer reduction combined with manure application were 52.3%,28.3%,and 60.4%,respectively,which were 16.8,8.9,and 12.9 percentage points higher than those of the conventional fertilizer treatment.