吉林省西部土地整理后N、P、K及中微肥S、Zn调控对玉米产量的影响

为解决吉林省西部土地整理后地力低、养分不平衡、玉米综合生产能力弱等问题,通过主要肥料量级试验,建立数学模型得出施肥量与玉米产量关系,并确定各种肥料的最佳施肥量。玉米田间试验结果表明:土地整理后N、P、K及微肥S、Zn施用模式符合二次曲线y=ax2+bx+c;利用该模式,结合肥料和玉米产量进行综合分析,明确了土地整理后玉米产量最大化的N、P、K及微肥S、Zn施用量,即N198.02 kg/hm2,P2O5107.36 kg/hm2,K2O 75.32 kg/hm2,S 48.72 kg/hm2,Zn 38.35 kg/hm2。

The effect of N,P,K and micronutrient fertilizer about S, Zn regulation on maize yield after land consolidation in the west of Jilin Province

In order to solve the problems of low soil fertility, nutrient unbalance, the weak ability of comprehensive production of maize after land consolidation in the west of Jilin Province. The experiment by several main maize fertilizer level, determined the relationship between fertilizer and maize production through mathematical model and the best fertilizer rate of various kinds of fertilizers. The results of field experiment showed that: the application model of N, P, K and the micronutrient fertilizer about S, Zn were in line with the quadratic curve y=ax2 bx c after land consolidation. Using the model, considering the amount of application and maize yield, we had cleared about the application rate of N, P, K and the micronutrient fertilizer about S, Zn at the maximization of maize production. That was N: 198.02 kg/hm2; P2O5:107.36 kg/hm2; K2O: 75.32 kg/hm2; S: 48.72 kg/hm2; Zn: 38.35 kg/hm2.