Journal of Nuclear Agricultural Sciences ›› 2019, Vol. 33 ›› Issue (10): 2048-2057.DOI: 10.11869/j.issn.100-8551.2019.10.2048

• Isotope Tracer Technique·Ecology & Environment·Physiology • Previous Articles     Next Articles

Characteristics of Yield Components From Middle-yield to Super-high-yield of Machine-transplanted Double Rice

LYU Weisheng1,2, ZENG Yongjun1,*, SHI Qinghua1, PAN Xiaohua1, HUANG Shan1, SHANG Qingyin1, TAN Xueming1, FANG Jiahai1   

  1. 1 Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education/Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Nanchang, Jiangxi 330045;
    2 Jiangxi Institute of Red Soil/National Engineering and Technology Research Center for Red Soil Improvement/Scientific Observational and Experimental Station of Arable Land Conservation in Jiangxi, Ministry of Agriculture and Rural Affairs, Nanchang, Jiangxi 331717
  • Received:2018-06-25 Revised:2018-10-04 Online:2019-10-10 Published:2019-07-31


吕伟生1,2, 曾勇军1,*, 石庆华1, 潘晓华1, 黄山1, 商庆银1, 谭雪明1, 方加海1   

  1. 1 作物生理生态与遗传育种教育部重点实验室/江西省作物生理生态与遗传育种重点实验室,江西 南昌 330045;
    2 江西省红壤研究所/国家红壤改良工程技术研究中心/农业农村部江西耕地保育科学观测实验站,江西 南昌 331717
  • 通讯作者: * 曾勇军,男,教授,主要从事水稻优质高产栽培理论与技术研究。
  • 作者简介:吕伟生,男,助理研究员,主要从事水稻、油菜优质高产栽培与耕作技术研究。
  • 基金资助:

Abstract: To accelerate the development of mechanical transplanting cultivation techniques of double rice, field experiments were conducted to study the characteristics of yield and yield components among three types of populations (super-high-yield:>9 000 kg·hm-2, high-yield: 8 250~9 000 kg·hm-2, middle-yield: 7 000~8 250 kg·hm-2) under mechanical transplanting, with four combinations of early rice (Zhuliangyou30, Liangyou287, Zhongjiazao17 and Zhongzao35) and four combinations of late rice (Hyou518, WufengyouT025, Wuyou308 and Tianyouhuazhan). The results showed that, the panicles, grains per panicle and total spikelets all increased significantly with the increase of yield level, while there was no significant difference in filled grain percentage and 1000-grain-weight. Significant positive linear correlation was existed between the total spikelets and grain yield. The total spikelet number should be greater than 42 000 per m2as yield was above 9 000 kg·hm-2. In order to enlarge the total spikelets of double rice, it mainly depended on enriching panicles from middle-yield to high-yield. From high-yield to super-high-yield, the enlarging of total spikelets of early rice can be realized by enriching panicles appropriately, and increasing grains per panicle on the basis of enriching panicles appropriately was an important approach to enlarging total spikelets of late rice. The basic characteristics of super-high-yielding machine-transplanted double rice were enriching the amount of total spikelets by obtaining more and bigger panicles and keeping normal filled grain percentage and 1000-grain-weight. The study provids theoretical and practical basis for mechanized transplanting technology of double rice.

Key words: machine-transplanted double rice, grain yield, yield components, population characteristic

摘要: 为明确双季机插稻产量构成特征及高产协同规律,促进双季稻机插栽培技术的发展,以4个早稻(株两优30、两优287、中嘉早17和中早35)和4个晚稻(H优518、五丰优T025、五优308和天优华占)品种(组合)为试验材料,研究双季机插稻中产(7 000~8 250 kg·hm-2)、高产(8 250~9 000 kg·hm-2)和超高产(>9 000 kg·hm-2)3个产量水平群体的产量及产量构成特征。结果表明,随着双季机插稻产量水平的提高,有效穗数、每穗粒数和总颖花量均呈显著增加的趋势,结实率和千粒重总体上差异较小;产量与群体总颖花量呈极显著正相关,要实现9 000 kg·hm-2以上的产量,每平方米颖花量需达到42 000以上;从中产到高产,双季早晚稻总颖花量的增加均主要依靠穗数的增加,从高产至超高产,早稻总颖花量的增加仍可以通过适当增加穗数实现,而晚稻总颖花量的增加应在适当增加穗数的基础上提高每穗粒数。以较多的穗数和较大的穗型协同产出较高的总颖花量,同时保证正常的结实率和千粒重,是双季机插稻超高产基本特征。本研究结果为双季机插稻高产栽培提供了理论依据与实践参考。

关键词: 双季机插稻, 产量, 产量构成, 群体特征