氮、磷、钾肥料用量对泉薯9号生长和产量的影响  

Effects of N,P and K Application Rate on Growth and Yield of Sweet Potato Variety Quanshu No.9

作　　者：秦文婧[1] 王芳东[2] 张杰[3] 刘佳[1] 王少先[1] 谢杰[1] 杨成春[1] 陈静蕊[1] 徐昌旭[1] 

机构地区：[1]江西省农业科学院土壤肥料与资源环境研究所/国家红壤改良工程技术研究中心/农业部长江中下游作物生理生态与耕作重点实验室,江西南昌330200 [2]江西省赣州市农业科学研究所,江西赣州341000 [3]南昌工程学院,江西南昌330099

出　　处：《江西农业学报》2016年第9期60-63,共4页Acta Agriculturae Jiangxi

基　　金：国家科技支撑计划项目“东南山地丘陵酸化贫瘠红壤旱地改良技术集成示范”(2012BAD05B04);江西省农业科学院创新基金(青年基金)项目“缓解芝麻连作障碍的土壤调理剂研制”(2014CQN009);江西省农业科学院创新基金(青年基金)项目“绿肥利用对红壤性水稻土有机碳库的影响”(2012CQN002);江西省青年科学基金项目“基于绿肥种植利用的红壤稻田有机碳库循环机制及源汇功能评价”(2014BAB214005);江西省科研院所基础设施配套项目“江西红壤丘陵区花生专用肥研发及配套施用技术”(20133BBA13025)

摘　　要：研究了氮、磷、钾肥不同用量（N：0、60、120、180kg／hm^2；P2O5：0、45、90、135kg／hm^2；K2O：0、90、180、270kg／hm^2）对泉薯9号在红壤旱地上生长及产量的影响。结果表明，氮肥对甘薯营养生长和产量有良好的促进作用，甘薯叶片叶绿素含量（SPAD值）、主茎长、一次分枝数、一次分枝长、全株叶片数和甘薯产量均随施氮量的增加而增加。磷肥对甘薯营养生长影响较小，不同用量之间的甘薯营养生长指标差异不显著，但磷肥对甘薯产量有明显的影响，随着磷肥用量的增加，产量呈抛物线形态。施钾在0—180kg／hm^2之间对甘薯营养生长的影响较小，当用量达270kg／hm^2时，则对甘薯营养生长有一定的抑制作用。钾肥有利于提高产量，随着钾肥用量的增加，甘薯产量呈直线增长趋势。The author studied the effects of nitrogen （N） , phosphorus （P） and potassium （K） application rates （N 0, 60, 120, 180 kg/hm^2 ; P2O5 0, 45, 90, 135 kg/hm2 ; K2O0, 90, 180, 270 kg/hm^2） on the growth and yield of sweet potato variety Quanshu No. 9 in red soil dryland. The results showed that N fertilizer had good promotive effects on the vegetative growth and yield of sweet potato, and the leaf chlorophyll content （SPAD value） , main stem length, number of primary branches, primary branch length, leaf number of whole plant and tuber yield of sweet potato all increased with the increase in N fertilizer application rate. P fertilizer had little effect on the vegetative growth of sweet potato, and there was no significant difference in vegetative growth indexes among different P application rate treatments ; but P fertilizer had an obvious impact on the tuber yield of sweet potato, and the tuber yield revealed a parabolic change trend when P fertilizer application rate increased. Applying 0- 180 kg/hm^2 K fertilizer had little effect on the vegetative growth of sweet potato, while applying 270 kg/hm^2 K fertilizer had a certain inhibitory effect on the vegetative growth of sweet potato; the application of K fertilizer helped to improve sweet potato yield, which linearly increased with the increase in K fertilizer application rate.

关 键 词：氮 磷 钾 用量 泉薯9号 生长 

分 类 号：S143[农业科学—肥料学]