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玉米平衡施肥回归设计试验结果表明 ,在黔西县玉米的最优施肥方案为 :N肥施用量为 12 6 7～ 18 4 6kg/6 6 7m2 ,P肥施用量为 2 6 8～ 3 4 1kg/ 6 6 7m2 ,K肥施用量为6 35～ 6 98kg/ 6 6 7m2 ,N∶P∶K平均为 1∶0 2 1∶0 4 5 ,且对于不同的土壤肥力水平要对施肥方案的N ,P肥进行适当调整 ,下等肥力的土壤要多施N少施P ,对于上等肥力的土壤要少施N多施P。
The regression experiment of corn balanced fertilization showed that the optimal fertilization program of corn in Qianxi County was as follows: N fertilizer application amount was 12 6 7 ~ 18 4 6kg / 6 6 7m 2, P fertilizer application amount was 26 8 ~ 34 1 kg / 6 6 7m2, K fertilizer application rate 6 35 ~ 6 98kg / 6 6 7m2, N:P:K average 1:02 1:04 5, and for different soil fertility levels of fertilization program N , P fertilizer to make appropriate adjustments, fertility of the soil should be applied more N less P, for the best fertility of the soil less N fertilization P.