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Optimizing the Total Spikelets Increased Grain Yield in Rice

文献类型： 外文期刊

作者： Liu, Kun 1 ; Zhang, Kaixi 3 ; Zhang, Yu 1 ; Cui, Jiarong 4 ; Li, Zhikang 5 ; Huang, Jian 6 ; Li, Shouguo 1 ; Zhang, Jingli 1 ; Deng, Shan 1 ; Zhang, Yiying 1 ; Huang, Jingyan 1 ; Ren, Li 1 ; Chu, Yunxia 1 ; Zhao, Hong 1 ; Chen, Hairong 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Inst Agrifood Stand & Testing Technol, Shanghai 201403, Peoples R China

2.Minist Agr & Rural Affairs, Shanghai Sub Ctr New Plant Variety Tests, Shanghai 201415, Peoples R China

3.Minist Agr & Rural Affairs, Dev Ctr Sci & Technol, Beijing 100176, Peoples R China

4.Zhejiang Normal Univ, Coll Chem & Life Sci, Jinhua 321004, Peoples R China

5.Minist Agr & Rural Affairs, Inst Ind Crops, Jiangsu Acad Agr Sci, Key Lab Cotton & Rapeseed, Nanjing 210014, Peoples R China

6.China Nanling Cty Planting Serv Ctr, Nanling 241312, Peoples R China

关键词： rice (Oryza sativa L.); high yield; rice varieties with various yield types; total spikelets; total nitrogen application rate

期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN：

年卷期： 2024 年 14 卷 1 期

页码：

收录情况： SCI

摘要： Maximizing rice yield potential has always been the focus of high-yield rice cultivation research. For high-yield rice cultivation and breeding, more research into the link between yield and yield components is essential. In this experiment, 38 rice varieties with different yield types and 185 rice varieties as materials were chosen. The relationships between yield and yield components were studied. The regulation effects of total nitrogen application rate (TNAR) on yield and yield components were observed. The results showed that (1) the grain yield of high-yield varieties was 189.3-195.6%, 76.1-77.7%, and 27.0-28.7% higher than that of super-low-yield, low-yield, and medium-yield varieties, respectively. Compared with rice varieties with other yield types, rice varieties with high-yield type have a higher total number of spikelets. (2) The spikelet number per panicle and total number of spikelets were significantly positively linked with grain yield, but significantly negatively correlated with filled grains and grain weight. (3) With an increase in TNAR (0-340 kg ha(-1)), the panicles, spikelet number per panicle, and total spikelets of rice varieties with different yield types increased gradually, and the filled grains and grain weight decreased gradually. The higher the TNAR, the more obvious the decrease in filled grains and grain weight. The grain yield of rice varieties with different yield types was the highest under the TNAR at 250 kg ha(-1). The main factor contributing to its high yield was the substantial increase in total spikelets. The above results showed that increasing the spikelet number per panicle and total spikelets played a material role in improving rice yield.

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