不同耕作方式下土壤肥力对玉米茎秆抗倒伏特性及产量的影响

doi:10.12190/j.issn.2096-1197.2020.02.02

Abstract

Abstract: 【Objective】To improve the contradiction between maize high-densification for yield and lodging in western area of Inner Mongolia.【Methods】By means of improving soil fertility with different tillage methods, planting density gradient was set to analyze the effects of different soil fertility on stem lodging resistance and yield of maize.【Results】The soil fertility increased and the lodging rate of maize decreased. The stem thickness, stem puncture strength and stem break strength increased;and after increasing planting density,the effect of soil fertility reduced lodging rates.The lodging rates of Xianyu 696 and Ximeng 6 at low density were reduced by 0.33,1.41,2.50 and 0.51,1.78,2.67 percentage points,at low,medium,and high fertility respectively.After the increased density comparing with farm household shallow-rotation tillage（CK）.They were reduced by 0.59,1.95,3.71 and 0.68,2.30,3.90 percentage points respectively.Soil fertility improved and maize yield increased compared with farm household shallow-rotation tillage.When Xianyu 696 and Simeng 6 reached the highest grain yield,increased by 0.21 t/hm² and 0.26 t/hm² at low-fertility;increased by 0.73 t/hm² and 0.86 t/hm²at medium fertility;increased 1.41 t/hm²and 1.68 t/hm² at high fertility compared with farm household shallow-rotation tillage.【Conclusion】The improvement of soil fertility could reduce the lodging rate and increase the yield by increasing the stalk thickness,stem puncture strength and stem break strength.

Key words: Maize, Soil fertility, Lodging resistance, Yield

CLC Number:

S513

LEI Juanwei, YU Xiaofang, GAO Julin, MA Daling, WANG Zhigang, SUN Jiying, HU Shuping, XU Peng. Effects of different soil fertility on resistance to stem lodging and yield in maize[J].Journal of Northern Agriculture, 2020, 48(2): 8-15.

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Effects of different soil fertility on resistance to stem lodging and yield in maize

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