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江苏省稻田施肥现状是 ,高产示范方每公顷用肥量 (折纯 ) 580～ 590kg ,比一般稻田高4 5%～ 50 % ,N、P2 O5、K2 O比例为 1∶0 31∶0 35。肥料成本占种稻成本的 30 %左右 ,示范方与一般稻田相差不大。水稻施肥上存在的主要问题是 ,数量上施N量偏多 ,P2 O5、K2 O比例偏低 ,肥料利用率较低 ;组分上有机肥与无机肥比例失衡 ,肥料结构及化肥品种单一 ;操作上肥料运筹及施肥方法不合理。本文从平衡配套施肥的角度提出了相应的对策及措施
The current status of fertilization in paddy fields in Jiangsu Province is that the yield per hectare (580 ~ 590kg) per hectare in high-yield demonstration area is 45% -50% higher than that in common paddy fields, and the ratio of N, P2 O5 and K2 O is 1:031:035 . Fertilizer costs account for about 30% of the cost of rice, demonstration and general paddy fields or less. The main problems in rice fertilization are: the amount of N applied is too large, the proportion of P2 O5 and K2 O is low, the utilization rate of fertilizers is low; the ratio of organic fertilizer to inorganic fertilizer is unbalanced, and the structure of fertilizer and fertilizer varieties are single; Operation of fertilizers and fertilizers methods of operation is not reasonable. This paper puts forward corresponding countermeasures and measures from the perspective of balanced fertilization