不同穗型品种与移栽密度对再生稻产量形成的影响

邹丹; 唐启源; 刘龙生; 毛瑞清; 旷娜; 郑华斌; 张明

引用本文:	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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不同穗型品种与移栽密度对再生稻产量形成的影响
邹丹¹, 唐启源², 刘龙生¹, 毛瑞清¹, 旷娜³, 郑华斌², 张明¹
1.衡阳市农业科学院;2.湖南农业大学农学院;3.湖南省水稻研究所

摘要:

【目的】旨在探究不同移栽密度与穗型品种对再生稻产量形成的影响。【方法】采用两因素裂区试验设计,以移栽密度为主区(D1:15万穴/hm2^、D2:18.75万穴/ hm2^、D3:22.5万穴/ hm2^、D4:26.25万穴/ hm2^、D5:30万穴/ hm2^、D6:33.75万穴/ hm2⁾,品种为副区(TYHZ:多穗型品种天优华占、HLY898:穗粒兼顾型品种徽两优898、YLY900:大穗型品种Y两优900)。【结果】品种类型和移栽密度对头季产量构成及周年产量均有显著的影响,但不存在显著性的交互作用。穗粒兼顾型品种HLY898头季产量最高,产量因子之间协调能力强,结实率高,周年产量也最高,其次是多穗型品种TYHZ,头季分蘖能力强,成穗率高,有效穗数足,头季和周年产量均显著高于大穗型品种YLY900。大穗型品种YLY900头季群体生长速率快,每穗粒数高,但是分蘖能力差,成穗率低,收获指数低,导致头季产量和周年产量均最低,显著低于其他类型品种。移栽密度以D5处理最佳,其头季和周年产量均最高,分蘖速度快,数量多,显著增加了头季有效穗数,提高了头季库容量、群体生长速率和干物质积累量,头季产量较其他处理显著增产,周年产量显著高于D1和D6处理。【结论】初步分析,再生稻应选择穗粒兼顾型和多穗型品种,依靠其分蘖成穗能力取得高产,移栽密度选择30万穴/ hm2^,此模式下,头季分蘖能力强,群体生长速率快,库容量大,周年产量最高。

关键词: 移栽密度;品种类型;再生稻;产量;干物质

DOI：

分类号:S274

基金项目:国家水稻产业技术体系项目(CARS-01-85), 湖南省农业科技创新资金项目,(2022CX125)

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

1.Hengyang Academy of Agricultural Sciences;2.College of Agronomy,Hunan Agricultural University;3.Hunan Rice Research Institute

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 /hm}2^{, D2: 187,500 points /hm}2^{, D3: 225,000 points /hm}2^{, D4: 262,500 points /hm}2^{, D5: 300,000 points /hm}2^{, D6: 337,500 points /hm}²). 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;