摘要
[目的]寻求适合伊犁地区甜菜适宜的肥料用量及比例。[方法]从伊犁地区甜菜肥料高效利用角度出发，设置了氮、磷、钾3因素4水平试验，根据获得的产量对氮、磷、钾肥料效应进行模拟，研究适宜的肥料用量及比例。[结果]甜菜产量与氮、磷、钾施用量的三元二次效应方程为y＝3319．3237＋297．9749N－8．4297P－8．8602K－6．9405N2－2．6289P2－1．1598K2－3．0601NP－2．9875NK＋10．1005PK。肥料实际用量为N 250．23 kg／hm2，P2O5138．15 kg／hm2、K2O 165．73 kg／hm2，3要素比例为1∶0．55∶0．66时，获得最佳产量87．38 t／hm2；氮肥肥料贡献率为35．65％，磷肥肥料贡献率为12．04％，钾肥肥料贡献率为10．50％，限制甜菜产量提高的养分限制因子从大到小依次为氮、磷、钾。[结论]伊犁地区甜菜生产中氮、磷、钾适宜的施用比例为1∶0．55∶0．66。
Abstract
Objective] The study aimed to seek suitable beet appropriate proportion and use level of fertilizer in Yili Region .[ Method] From the angle of the Yili Region beet fertilizer utilization, set the NPK 3 factors 4 levels test, according to the production to simulate the effect of NPK fertilizer to seek suitable beet appropriate proportion of fertilizer in Yili Region.[Result] The relationship of beet yields with NPK fertiliz-er inputs was simulated out into a ternary quadratic formula.The formula is y =3 319.323 7 +297.974 9N -8.429 7P -8.860 2K -6.940 5N2 -2.628 9P2 -1.159 8K2 -3.060 1NP-2.987 5NK+10.100 5PK;through the formula we could calculated out that when the re-al fertilizer inputs were N=250.23 kg/hm2, P2O5 =138.15 kg/hm2, K2O=165.73 kg/hm2, these three fertilizer elements ration was 1∶0.55∶0.66, the beet could output the best suitable yield, 87.38 t/hm2 .The rate of contribution of N fertilizer was 35.65%, the rate of con-tribution of P fertilizer was 12.04%, the rate of contribution of P fertilizer was 10.5%.The limit factor in beet yield growth was N>P>K. [Conclusion] Suitable beet appropriate proportion of fertilizer NPK elements ration was 1∶0.55∶0.66 in Yili region.
基金项目
国家甜菜现代农业产业技术体系项目(CARS－210409)
国家科技期刊平台
NSTL
万方数据