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Effects of different mechanical direct seeding methods on grain yield and lodging resistance of early indica rice in South China

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Journal of Integrative Agriculture 2021年第5期20卷 1204-1215页

作者： WANG Wen-xia DU Jie ZHOU Yan-zhi ZENG Yong-jun TAN Xue-ming PAN Xiao-hua SHI Qing-hua WU Zi-ming ZENG Yan-hua Key Laboratory of Crop Physiology Ecology and Genetic BreedingMinistry of Education/Collaborative Innovation Center for the Modernization Production of Double Cropping RiceCollege of AgronomyJiangxi Agricultural UniversityNanchang 330045P.R.China

direct seeding of rice has become a main planting method due to the low labor input and high economic benefit in South *** direct seeding(DDS)has been widely used for single-season rice planting ***,few studies have examined the performance of early-season indica rice under mechanical dry direct seeding.A two-year field experiment was conducted with two indica rice cultivars(i.e.,Zhongjiazao 17 and Zhuliangyou 819)to study lodging characteristics and grain yield formation under DDS,flooded direct seeding(FDS)and wet direct seeding(WDS)*** results showed that the annual grain yield in DDS was higher by 14.42–26.34%for cultivar ZLY819 and 6.64–24.58%for cultivar ZJZ17 than in WDS and FDS,respectively,and these increases were mainly attributed to the improvement of the *** DDS pattern significantly increased the seedling emergence rate of early indica rice cultivars,and increased total dry weight and crop growth ***,shorter basal internodes,better stem diameter and stem wall thickness and lower lodging index were found in DDS in contrast to FDS and *** particular,DDS improved the stem lodging *** results suggested that the appropriate direct seeding method was beneficial for improving the grain yield and lodging resistance of early indica rice.

关键词： mechanical dry direct seeding early indica rice grain yield lodging resistance South China

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