Cite this article: | 邹丹,唐启源,刘龙生,等.不同穗型品种与移栽密度对再生稻产量形成的影响[J].灌溉排水学报,0,():-. |
| ZOU Dan,TANG Qi-yuan,LIU Long-sheng,et al.不同穗型品种与移栽密度对再生稻产量形成的影响[J].灌溉排水学报,0,():-. |
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DOI: |
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Effects of different panicle-typed Varieties and transplanting density on yield formation of the ratooning rice |
ZOU Dan1, TANG Qi-yuan2, LIU Long-sheng1, MAO Rui-qing1, KUANG Na3, ZHENG Hua-bin2, ZHANG Ming1
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1.Hengyang Academy of Agricultural Sciences;2.College of Agronomy,Hunan Agricultural University;3.Hunan Rice Research Institute
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Abstract: |
【Objective】 The purpose of this study is to investigate the effects of different transplanting densities and different panicle-typed varieties on the yield formation of the ratooning rice. 【Method】 A two-factor split plot design was adopted, and the main plot was transplanting density (D1: 1.5×104 points /hm2, D2: 187,500 points /hm2, D3: 225,000 points /hm2, D4: 262,500 points /hm2, D5: 300,000 points /hm2, D6: 337,500 points /hm2). Varieties were sub-regions (TYHZ: multi-panicle variety Tianyou Huazhan, HLY898: the panicle-kernel-type variety Huiliangyou 898, YLY900: the big- panicle-typed variety Yliangyou 900). 【 Result 】 Both variety type and transplanting density had significant effects on yield composition in the most-season and annual yield, but there was no significant interaction. The panicle-kernel-type variety HLY898 had the highest most-season yield, strong coordination ability among yield factors and high seed setting rate, and the highest annual yield, followed by multi-panicle variety TYHZ, strong tillering ability, high ear-setting rate and full panicle number per unit area, which were significantly higher than that of the big- panicle-typed variety YLY900. YLY900 had fast population growth rate and high grain number per panicle, but poor tillering ability, low ear-setting rate and low harvest index, resulting in the lowest most-season yield and annual yield, which were significantly lower than those of other varieties. The best transplanting density was D5, which had the highest most-season yield and annual yield. and faster tillering rate and more tillers per unit area, significantly increased panicle number and sink capacity, faster population growth rate, stronger dry matter accumulation ability, and significantly increased yield of the main-season compared with other treatments, and significantly increased annual yield compared with D1 and D6. 【Conclusion】 According to the preliminary analysis, the varieties with both panicle and grain should be selected in the first season, relying on their tillering ability to achieve high yield, and the transplanting density should be 300,000 holes/hm2. Under this mode, the tillering ability is strong、the population growth rate is the fastest and sink capacity is bigger, the annual yield is the highest. |
Key words: transplanting density; variety types; ratooning rice; yield; dry matter; |
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