摘要
在中等肥力的沙质红泥土上实施甘蔗"3414"肥料效应试验,分析表明:氮磷钾肥对甘蔗的增产作用是氮肥增产幅度最大,钾肥次之,磷肥最小;建立的肥料效应方程,氮、磷、钾肥施用量与甘蔗产量相关性强,有显著的回归性,两者之间呈抛物线关系;肥料利用率低,氮肥利用率10.83%,磷肥利用率6.63%,钾肥利用率21.44%;试验耕地肥力为中等水平,土壤供肥量每667m2为N 7.67kg、P2O52.83kg、K2O 15.74kg,土壤养分氮属于中等偏低水平,磷钾属于中等水平;甘蔗推荐施肥量每667m2为N 27kg、P2O59kg、K2O 23kg。
A ＂3414＂ fertilizer effect experiment of sugarcane was conducted in middle-fertility sandy red soil, the result analysis shows that N fertilizer application has the largest yield-increase among the N, P, K fertilizers, and then the K fertilizer secondly, the P fertilizer thirdly. In fertilizer effect equation, the application amounts of N, P, K have strong correlations with sugarcane-yield, obvious regression and parabolic relation. The use efficieneies of fertilizers are all low： 10.83% for N fertilizer, 6.63% for P fertilizer and 21.44% for K fertilizer; the soil fertility provisions per 667m^2 are 7.67 kg for N, 2.83 kg for P2O5, 15.74 kg for K2O. The nutrient level of N in soil is middle-lower, middle level for P. The recommended fertilizations are 27 kg for N, 9 kg for P2O5, 23 kg for K2O per 667m^2.
出处
《广西农学报》
2015年第1期18-21,共4页
Journal of Guangxi Agriculture
基金
广西农业科技重点推广项目
