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首页> 外文期刊>农业科学学报（英文版） >No-tillage effects on grain yield and nitrogen requirements in hybrid rice transplanted with single seedlings: Results of a long-term experiment
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No-tillage effects on grain yield and nitrogen requirements in hybrid rice transplanted with single seedlings: Results of a long-term experiment

机译：免耕对单秧杂交水稻产量和氮素需求的影响：一项长期实验的结果

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摘要

This study was conducted to determine whether, and if so how, the grain yield and nitrogen (N) requirements of hybrid rice transplanted as single seedlings are affected by no-tillage (NT) practices. A fixed field experiment was done at the Experimental Farm of Hunan Agricultural University in Changsha, Hunan Province, China, from 2004 to 2014. Grain yield and yield attributes (panicle number per m2, spikelet number per panicle, spikelet filling percentage, grain weight, total biomass, and harvest index) were evaluated as well as the N-use characteristics (total N uptake, internal N-use efficiency, and N requirements) of hybrid rice transplanted as single seedlings comparing NT with conventional tillage (CT). A significant finding was that there were no significant differences in grain yield, yield attributes, and N-use characteristics between CT and NT. Averaged across the 11 years, grain yield and N requirements were 9.51 t ha?1and 20.2 kg t?1under CT and 9.33 t ha?1and 20.0 kg t?1under NT, respectively. There were significant yearly variations in grain yield, yield attributes, and N-use characteristics observed under both CT and NT. The yearly variation in grain yield was related to simultaneous changes in spikelet number per panicle, grain weight, total biomass, and harvest index. Also, it was found that grain yield was positively correlated with internal N-use efficiency but negatively correlated with N requirements. It is concluded that grain yield and N requirements in hybrid rice when transplanted as single seedlings are not affected adversely by NT. The results of this study suggest that (1) compatible relationships among yield attributes can be established in hybrid rice that is transplanted as single seedlings, and (2) higher grain yield and higher N-use efficiency can be concurrently achieved in hybrid rice transplanted as single seedlings.
机译：进行这项研究的目的是确定免耕（NT）措施是否会影响杂交水稻（作为单株幼苗）的籽粒产量和氮（N）需求，以及是否如此。 2004年至2014年，在中国湖南省长沙市湖南农业大学实验农场进行了固定田间试验。比较了总氮和常规耕作（CT），评估了作为单苗移植的杂交水稻的总氮利用量（总生物量和收获指数）以及氮利用特性（总氮吸收，内部氮利用效率和氮需求）。一个重要的发现是，CT和NT在谷物产量，产量属性和氮利用特性方面没有显着差异。在这11年中，玉米平均单产和氮需求量在CT下分别为9.51 t ha？1和20.2 kg t？1，在NT下分别为9.33 t ha？1和20.0 kg t？1。在CT和NT下均观察到谷物产量，产量属性和氮利用特征的年度显着变化。谷物产量的年度变化与每穗小穗数，籽粒重量，总生物量和收获指数的同时变化有关。另外，还发现谷物产量与内部氮利用效率呈正相关，而与氮需求呈负相关。得出的结论是，杂交水稻单株移植时的产量和氮需求量不受氮的不利影响。研究结果表明：（1）单株移植杂交水稻可以建立产量属性之间的相容关系;（2）单株移植杂交水稻可以同时获得更高的籽粒产量和更高的氮利用效率。单苗。

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  • 来源
    《农业科学学报（英文版）》 |2019年第1期|24-32|共9页
  • 作者

    HUANG Min; CHEN Jia-na; CAO Fang-bo; ZOU Ying-bin; Norman Uphoff;

  • 作者单位

    Southern Regional Collaborative Innovation Center for Grain and Oil Crops (CICGO), Hunan Agricultural University, Changsha 410128, P.R.China;

    International Programs-College of Agriculture and Life Sciences (IP-CALS), Cornell University, Ithaca 14853, USA;

    Southern Regional Collaborative Innovation Center for Grain and Oil Crops (CICGO), Hunan Agricultural University, Changsha 410128, P.R.China;

    Southern Regional Collaborative Innovation Center for Grain and Oil Crops (CICGO), Hunan Agricultural University, Changsha 410128, P.R.China;

    Southern Regional Collaborative Innovation Center for Grain and Oil Crops (CICGO), Hunan Agricultural University, Changsha 410128, P.R.China;

    International Programs-College of Agriculture and Life Sciences (IP-CALS), Cornell University, Ithaca 14853, USA;

  • 收录信息 中国科学引文数据库(CSCD);
  • 原文格式 PDF
  • 正文语种 eng
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