首页|The underlying mechanism of variety-water-nitrogen-stubble damage interactions on yield formation in ratoon rice with low stubble height under mechanized harvesting

The underlying mechanism of variety-water-nitrogen-stubble damage interactions on yield formation in ratoon rice with low stubble height under mechanized harvesting

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  • 国家科技期刊平台
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Agronomic measures are the key to promote the sustainable development of ratoon rice by reducing the damage from mechanical crushing to the residual stubble of the main crop,thereby mitigating the impact on axillary bud sprouting and yield formation in ratoon rice.This study used widely recommended conventional rice Jiafuzhan and hybrid rice Yongyou 2640 as the test materials to conduct a four-factor block design field experiment in a greenhouse of the experimental farm of Fujian Agricultural and Forestry University,China from 2018 to 2019.The treatments included fertilization and no fertilization,alternate wetting and drying irrigation and continuous water flooding irrigation,and plots with and without artificial crushing damage on the rice stubble.At the same time,a 13C stable isotope in-situ detection technology was used to fertilize the pot experiment.The results showed significant interactions among varieties,water management,nitrogen application and stubble status.Relative to the long-term water flooding treatment,the treatment with sequential application of nitrogen fertilizer coupled with moderate field drought for root-vigor and tiller promotion before and after harvesting of the main crop,significantly improved the effective tillers from low position nodes.This in turn increased the effective panicles per plant and grains per panicle by reducing the influence of artificial crushing damage on rice stubble and achieving a high yield of the regenerated rice.Furthermore,the partitioning of 13C assimilates to the residual stubble and its axillary buds were significantly improved at the mature stage of the main crop,while the translocation rate to roots and rhizosphere soil was reduced at the later growth stage of ratooning season rice.This was triggered by the metabolism of hormones and polyamines at the stem base regulated by the interaction of water and fertilizer at this time.We therefore suggest that to achieve a high yield of ratoon rice with low stubble height under mechanized harvesting,the timely application of nitrogen fertilizer is fundamental,coupled with moderate field drying for root-vigor preservation and tiller promotion before and after the mechanical harvesting of the main crop.

mechanized harvestingratoon ricerice stubbleyield attributes

Jingnan Zou、Ziqin Pang、Zhou Li、Chunlin Guo、Hongmei Lin、Zheng Li、Hongfei Chen、Jinwen Huang、Ting Chen、Hailong Xu、Bin Qin、Puleng Letuma、Weiwei Lin、Wenxiong Lin

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College of Life Sciences,Fujian Agriculture and Forestry University(FAFU)/Fujian Key Laboratory for Agroecological Processes and Safety Monitoring,Fuzhou 350002,China

College of Agriculture,FAFU/Fujian Key Laboratory for Crop Physiology and Molecular Ecology,Fuzhou 350002,China

Institute of Oceanography,College of Geography and Oceanography,Minjiang University,Fuzhou 350108,China

The Agricultural Extension Station of Pucheng County,Nanping 353400,China

Crop Science Department,The National University of Lesotho,Roma 00100,Lesotho

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National Nature Science Foundation of ChinaNational Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaFujian and Taiwan Cultivation Resources Development and Green Cultivation Coordination Innovation Center,China(Fujian 2011 PNatural Science Foundation of Fujian Province,China

3020011092016YFD03005082017YFD03016022018YFD03011052015-752022J01142

2024

10.1016/j.jia.2023.05.038

农业科学学报(英文)
中国农业科学院农业信息研究所

农业科学学报(英文)

CSTPCD
影响因子：0.576
ISSN：2095-3119
年,卷(期)：2024.23(3)
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