...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>日本作物學會紀事 >Studies of Direct-sowing Rice Culture by Broadcasting of Seed on submerged Paddy Field : IV. Relationship of seeding density to plant growth and rice yield
【24h】

Studies of Direct-sowing Rice Culture by Broadcasting of Seed on submerged Paddy Field : IV. Relationship of seeding density to plant growth and rice yield

机译：淹没稻田种子播放直播水稻培养研究：IV。种子密度与植物生长和水稻产量的关系

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Pot tests were attempted at Faculty of Agriculture, Okayama University in 1963 as to the relationship of seeding density to plant growth and rice yield in case where rice seed was sown by broadcasting by hand directly on the submerged paddy field. Size of each pot: 1 meter long, 0.8 meter in width, and 1 meter in depth. Sample rice variety: PI-5. Tests were made by four replications as to the seven plots (from 30-hill plot to 210-hill plot) aligned at random. Fertilizers were applied according to the customary practice. Test results can be summarized as follows : (1) At the earlier plant growth stage, culm height of rice plants in the densely sown plots was higher than that in the sparsely sown ones, but vice versa at the later plant growth stage. (2) At the peak tillering stage, the number of tillers per unit area in the densely sown plots showed an increase over that in the sparsely sown ones, but after that stage, the former showed a marked decrease in the number of tillers. At the harvesting time, the number of panicles in 90-hill plot was greatest, reaching 502 panicles per square meter and that in 30-hill plot was smallest, showing 304 panicles and that in the plot sown more densely showed a decrease to about 405 panicles. (3) Rice yield in 90-hill plot was highest. This is due to the greatest number of panicles therein. (4) Rice yield in the plots sown densely more than 120 hills was lower than that in 90-hill plot. This can be ascribed to the inadequate amount of the customary fertilizer application for the densely sown plots in the later plant growth stage. Consequently, if improved split-application practice be designed, rice yield in the densely sown plots would show more favorable trend than that in other plots.
机译：1963年在1963年在农业大学，1963年在农业大学播种密度与稻种养殖稻田播种的植物生长和水稻产量的关系，在淹没稻田播种的情况下，在植物生长和水稻产量的关系。每个锅的尺寸：1米长，宽0.8米，深度为1米。样品米品种：PI-5。测试是通过四个曲线（从30-hill绘图到210-hill绘图）随机排列的测试。根据习惯实践应用肥料。测试结果可以概括如下：（1）在较早的植物生长阶段，密集播种的地块中的水稻植物的高度高于稀疏播种的阶段，但反之亦然在后期的植物生长阶段。 （2）在峰值分蘖阶段，在浓度播种的地块中每单位面积的分蘖数显示在稀疏播种的地位上的增加，但是在该阶段之后，前者在分蘖数量下显示出显着的减少。在收获时间，90坡图中的圆锥片数最大，达到每平方米的502个圆锥片，在30粒剧情中最小，显示304个圆锥，并且在剧集中播种更密集地显示为约405圆锥花序。 （3）90坡图中的水稻产量最高。这是由于其中最多的面板。 （4）播种的稻米产量密集120多座山块低于90山地块。这可以归因于在后期植物生长期的常规播种地块中的常规肥料应用的不足。因此，如果设计了改进的分裂申请实践，浓度播种的地块中的水稻产量将显示比其他地块更有利的趋势。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号