温室茄子氮、磷、钾素最大利润施用量研究

为了研究温室茄子氮、磷、钾素最大利润施用量,为茄子合理施肥和安全生产提供参考,在甘肃省张掖市甘州区党寨镇温室内,采用田间小区试验方法,进行了温室茄子氮、磷、钾素最大利润施用量研究。结果表明:随着氮、磷、钾素施用量梯度的增大,茄子产量逐渐增加,边际产量、边际产值和边际利润均呈递减趋势,其中边际利润最终出现负值。根据最大利润施用量计算公式求得茄子氮、磷、钾素最大利润施用量分别为0.62、0.41、0.29 t/hm~2,进而得出最大利润施用量的理论产量分别为95.58、96.04、95.35 t/hm~2。

Study on Maximum Profit Application Amount of N, P and K on Eggplant in Greenhouse

In order to provide reference for rational fertilization and safe production of eggplant, the maximum profit of nitrogen, phosphorus and potassium on eggplant in greenhouse was studied. In the greenhouse of Dangzhai town, Ganzhou district, Zhangye city, Gansu province, a field plot experiment was carried out to study the maximum application amount of nitrogen, phosphorus and potassium on eggplant in greenhouse. The results showed that the yield of eggplant increased gradually with the increase of nitrogen, phosphorus and potassium application gradient, and the marginal product, marginal output value and marginal profit all showed a decreasing trend, and the marginal profit finally appeared negative value. According to the formula of maximum profit application amount, the maximum profit application amount of nitrogen, phosphorus and potassium on eggplant was 0.62, 0.41 and 0.29 t/hm2, respectively, and the theoretical yield of maximum profit application amount was 95.58, 96.04, 95.35 t/hm2, respectively.