Soil Tillage Methods on Stalk Lodging Resistance of Summer Maize

doi:10.3969/j.issn.1000-7091.2013.04.030

Abstract

Abstract: Recent studies have shown that stem lodging has reduced maize yields in Hebei Province，mainly un- der high- yielding conditions．In this paper，the effects of tillages management with No Tillage，No Tillage + Ridging， Rotary Tillage and Rotary Tillage + Ridging were studied on morphological characteristics，mechanical characteristics of stem and yield characters using three logging resistance maize varieties，Xianyu 335 (Low resistance) ，Xundan 20 (Low resistance) and Jingdan 28 (High resistance)．The results showed that Rotary Tillage had lower plant height， ear height and high center of gravity，smaller ratio of internode length /diameter of the 4th and 5th under ear，better stretching resistance of stem and internodes mechanical strength of the 4th and 5th under ear．Therefore， Rotary Till- age had the lowest loging rate．Ridging atatelongation stage was opposite on morphological characteristics and nical characteristics of stem，and the loging rate of Xianyu 335 and Xundan 20 were 89．6% and 82．2%．It is found that the loging rate of Jingdan 28，Xianyu 335 and Xundan 20 were 0， 11． 2% and 10．6% under No Tillage，the lodging resistance were second to Rotary Tillage．However， the 100- grain weight，kernels per spike and yield were higher than Rotary Tillage．

Key words: Soil tillage methods, Plant morphology, Stalk mechanics, Lodging rate, Yield

CLC Number:

S156

JIA Gui-ping, BIAN Da-hong, CAI Li-jun, DU Xiong, NIU Hai-feng, CUI Yan-hong. Soil Tillage Methods on Stalk Lodging Resistance of Summer Maize[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(4): 163-168. doi: 10.3969/j.issn.1000-7091.2013.04.030.

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