首页|氮、磷、钾肥料用量对泉薯9号生长和产量的影响

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 Varite y Quanshu No.9

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研究了氮、磷、钾肥不同用量（N：0、60、120、180 kg／hm2；P2O5：0、45、90、135 kg／hm2；K2O：0、90、180、270 kg／hm2）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0～180 kg／hm2之间对甘薯营养生长的影响较小，当用量达270 kg／hm2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/hm2;P2O5 0, 45, 90, 135 kg/hm2;K2O 0, 90, 180, 270 kg/hm2) on the growth and yield of sweet potato varie-ty 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 po-tato, and the tuber yield revealed a parabolic change trend when P fertilizer application rate increased.Applying 0~180 kg/hm2 K fertilizer had little effect on the vegetative growth of sweet potato , while applying 270 kg/hm2 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 .

NitrogenPhosphorusPotassiumApplication rateQuanshu No.9Growth Yield

秦文婧、王芳东、张杰、刘佳、王少先、谢杰、杨成春、陈静蕊、徐昌旭

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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

江西省赣州市农业科学研究所，江西 赣州 341000

南昌工程学院，江西 南昌 330099

氮 磷 钾 用量 泉薯9号 生长

国家科技支撑计划项目江西省农业科学院创新基金(青年基金)项目江西省青年科学基金江西省科研院所基础设施配套项目江西省农业科学院创新基金(青年基金)项目

2012BAD05B042014CQN0092014BAB21400520133BBA130252012CQN002

2016

10.19386/j.cnki.jxnyxb.2016.09.14

江西农业学报
江西省农业科学院 江西省农学会

江西农业学报

CSTPCD
影响因子：0.632
ISSN：1001-8581
年,卷(期)：2016.28(9)
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