氮磷钾镁硫混合施用对油菜产量的影响  

Nutrients effect of N P K Mg and S on yield in rapeseed(Brassic napus L)

作　　者：汪瑞清[1] 杨国正[1] 陆丽娟[1] 姚艳丽[1] 宋峥[1] 史茜莎[1] 彭运磊[1] 

机构地区：[1]华中农业大学植物科学技术学院,湖北武汉430070

出　　处：《中国油料作物学报》2008年第2期212-217,共6页Chinese Journal of Oil Crop Sciences

基　　金：国家"十一五"支撑计划资助(2006BAD21B03)

摘　　要：采用混合均匀设计方法，以中油杂11号为试验材料，研究了氮、磷、钾、镁、硫5种肥料对油菜产量的影响。结果表明，5种肥料对产量影响显著，其影响顺序为：S（X5）〉N（X1）＞K2O（X3）＞P2O5（X2）＞Mgo（X4）。交互项X2×X5对产量的影响显著，低磷、高硫，或高磷、低硫时，产量较高；但均处于中间水平时产量反而较低。目标产量为3000kg／hm^2时，各种肥料的适宜施用量分别为N255．78—259．01kg,／hm^2，P205129．87—131．50kg／hm2，I（10127．51—130．08kg／hm^2，Mg07．40—7．74kg／hm^2，S1．96—2．06kg／hm^2。通径分析结果表明，产量构成因素对产量的影响顺序：单位面积角果数（0．811）＞角果粒数（0．422）〉千粒重（0．311）。By using mixes-uniform design, a field trial on the effect of N P K Mg and S on the yield of rapeseed （Brassica napus L var Zhongyouza No. 11 ） was conducted. The results indicated that the nutrients had significant （p 〈5% ） effect on rapeseed yield with the sequence ofS（X5） 〉 N（X1） 〉 K2O（X3） 〉 P2O5（X2） 〉 MgO （X4）- The yield was also affected by the interaction of X2 and Xs, which was higher after applied either more P and fewer S or more S and fewer P was applied. With aimed seed yield of 3 O00kg/hm^2, the optimum fertilizers rate was 255.78 -259.01kg/hm^2 of N, 129.87 - 131.50 kg/hm^2 of P205, 127.51 - 130.08 kg/hm^2 of K20, 7.40 -7.74 kg/hm^2 of MgO and 1.96 - 2.06 kg/hm^2 of S. The path - analysis indicated that the sequence of the impact on rapeseed yield was pods number per unit area （0.811） 〉 grain number per pod （0. 422） 〉 1000 - grain weight （0.311）.

关 键 词：油菜 氮磷钾镁硫 产量 均匀设计 

分 类 号：S565.4[农业科学—作物学] S147.21