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作物学报 ›› 2016, Vol. 42 ›› Issue (06): 924-931.doi: 10.3724/SP.J.1006.2016.00924

• 研究简报 • 上一篇    下一篇

单本密植机插对杂交稻生长和产量的影响

谢小兵,王玉梅,黄敏,赵春容,陈佳娜,曹放波,单双吕,周雪峰,李志斌,范龙,高伟,邹应斌*   

  1. 湖南农业大学农学院, 湖南长沙 410128
  • 收稿日期:2015-12-18 修回日期:2016-03-14 出版日期:2016-06-12 网络出版日期:2016-03-21
  • 通讯作者: 邹应斌, E-mail: ybzou123@126.com; Tel: 0731-84618758
  • 基金资助:

    本研究由国家现代农业产业技术体系建设专项水稻栽培与土壤岗位科学家项目(CARS-01-30)资助。

Effect of Mechanized Transplanting with High Hill Density and Single Seedling per Hill on Growth and Grain Yield in Super Rice

XIE Xiao-Bing,WANG Yu-Mei,HUANG Min,ZHAO Chun-Rong,CHEN Ja-Na,CAO Fang-Bo,SHAN Shuang-Lü,ZHOU Xu-Feng,LI Zhi-Bin,FAN Long,GAO Wei,ZOU Ying-Bin*   

  1. 湖南农业大学农学院, 湖南长沙 410128
  • Received:2015-12-18 Revised:2016-03-14 Published:2016-06-12 Published online:2016-03-21
  • Contact: 邹应斌, E-mail: ybzou123@126.com; Tel: 0731-84618758
  • Supported by:

    This study was supported by the Earmarked Fund for China Agriculture Research System (CARS-01-30).

摘要:

为了研究单本密植机插和常规机插对杂交稻分蘖动态、干物质积累、辐射利用率和产量及产量构成的影响,在湖南省浏阳市以杂交稻泰优390、五优308为材料和在广东省肇庆市以五优308为材料,进行印刷播种和常规播种的秧苗素质比较以及单本密植机插和常规机插的大田栽培试验。结果表明,两试验点印刷播种的叶龄、白根数、总根数、茎基宽、地上部干重和地下部干重均明显高于常规播种。单本密植机插的最高分蘖数和有效分蘖数显著低于常规机插,但单本密植机插的每穗粒数、总颖花数、结实率和千粒重高于常规机插,增产10.28%~13.96%,达到显著水平。从穗部性状来看,单本密植机插的一次枝梗数、二次枝梗数、穗长、着粒密度和单穗重均显著高于常规机插。在生长前期,单本密植机插的干物质积累和叶面积指数低于常规机插,而成熟期干物质量比常规机插高0.61%~9.45%且收获指数显著高于常规机插。此外,单本密植机插的截获辐射量和截获率低于常规机插,而辐射利用率显著高于常规机插。由此可见,杂交稻单本密植机插不仅可以降低用种量、提高秧苗素质,还能增加每穗粒数、总颖花数、千粒重及提高结实率、收获指数和辐射利用率,从而获得高产。

关键词: 杂交稻, 单本密植机插干物质, 辐射利用率, 产量

Abstract:

The high sowing rate and poor transplanting performance hinder a large-scale mechanized transplanting of hybrid rice in China. In order to study the effects of mechanized transplanting with high hill density and single seedling per hill (MTHS) and conventional mechanized transplanting (CMT) on tillering, dry matter accumulation, radiation use efficiency, grain yield and its components, comparisons of seedling quality between printing sowing and conventional sowing, and field experiments between MTHS and CMT were conducted using hybrid rice cultivar Taiyou 390 and Wuyou 308 at Liuyang, Hunan Province and using Wuyou308 at Zhaoqing, Guangdong province. The results showed that leaf age, white root number, total root number, basal width of shoot, dry weight of shoot and dry weight of root of the printing sowing were more than those of the conventional sowing at two locations. The MTHS had significantly less maximum tiller number and effective tiller number than CMT, but had more spikelets per panicle and spikelets per m2, higher grain setting rate and 1000-grain weight, as well as significantly increased grain yield by 10.28−13.96%. On the other hand, The MTHS had more primary branch number and secondary branch number, longer panicle length, higher grain density and panicle weight than CMT, with significant differences. Although the MTHS had less dry matter accumulation and lower LAI than CMT before the heading stage , produced more dry matter at physiology maturity and had significantly higher harvest index and radiation use efficiency. Therefore, the MTHS could produce high grain yield for hybrid rice due to not only reducing sowing rate and improving seedling quality, but also increasing spikelets per panicle, spikelets per m2 and 1000-grain weight and improving grain setting rate, harvest index and radiation use efficiency.

Key words: Hybrid rice, Mechanized transplanting with high hill density and single seedling per hill, Dry matter, Radiation use efficiency, Grain yield

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