江山市水稻高产创建特点及肥料偏生产力分析OA

The yields and associated synthetic fertilizer applications in high-yield cultivation technology of rice in 2024 from Jiangshan city,Zhejiang province were investigated and analyzed.The results showed that mean yield of rice with high-yield cultivated technology in Jiangshan was higher than both national mean rice yield and mean value of rice yield in Jiangshan city,with a rising rate of 28.3%and 26.8%respective-ly.Compared with yield in rice managed with traditional practices,large benefits would be obtained from high-yield cultivation technology of rice with an increase incomes of 8481.2 元/hm2 for eraly rice,4463.1 元/hm2 for late rice,and 4753.9 元/hm2 for single-cropping rice,re-spectively.Fertilizer inputs in Jiangshan City with a mean N of 244.3 kg/hm2,P2O5 of 81.7 kg/hm2 and K2O of 161.3 kg/hm2 were lower than that of rice with high-yield fertilizer application rate in Zhejiang Province;the partial factor productivity(PFP)for N,P2O5,and K2O were 38.7,119.7,and 67.2 kg/kg,respectively,which were higher in comparison with PFP of rice high-yield production in Zhejiang Province while lower than partial factor productivity from applied N,P,and K during rice production in Yangtze Valley.This indicated that the effectt of increasing yield in high-yield cultivation technology of rice in Jiangshan is relaticely low,may be prone to leading a risk of diffuse pollution due to low utilization efficiency.It is suggested that both high yield and environment cost should be considered in rice cultivation,and it is of most importance to promote development of environmental friendly high-yield cultivation technology of rices via optimizing fertilizer manage-ments.