中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

旱育长秧龄抛栽水稻的养分及干物质积累特性初步研究

陈小荣 1，2; 潘晓华 1   

  1. 1江西农业大学 农学院，江西 南昌 330045； 2 浙江大学 农业与生物技术学院，浙江 杭州 310029
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2001-04-10 发布日期:2001-04-10

Preliminary Study on the Accumulation Characters of Nutrient and Dry Matter of Dryland Raised Long-Age Seedlings Associated with Scattered-Planting in Rice

CHEN Xiao-rong 1; 2; PAN Xiao-hua 1   

  1. (1College of Agronomy; Jiangxi Agricultural University; Nanchang 330045; China; 2Agricultural and Biotechnological College; Zhejiang University; Hangzhou 310029; China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2001-04-10 Published:2001-04-10

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摘要： 以两系杂交水稻田两优402和培两优特青为材料，研究了旱育长秧龄抛秧栽培N、P、K的吸收及干物质的积累、转运和分配特性。结果表明：旱育长秧龄抛秧栽培可以明显提高N、P、K的吸收和干物质的积累，尤其是前期、中期。旱育长秧龄抛秧齐穗后单位面积穗干物质和N、P、K增量大，但茎叶运转率低，穗部所占总量比例小，N、P、K的生产效率低。旱育长秧龄抛秧抛入大田后分蘖早、快、足，单位面积容纳的穗数与颖花量多，能够发挥群体优势，提高单位面积产量。

关键词: 水稻, 育秧, 抛秧, 养分吸收, 干物质积累

Abstract: Rice scattered-planting is a new agronomic practice that seed is sowed in the plastic disc with many holes and is scattered when the seedlings are transplanted to the field. It needs no transplanting by hand and much less labor. The accumulation characters of NPK and dry matter of this new practice using two line hybrid rice associated with long-age seedlings of two seasons were studied. The results are as follows: Long age seedlings associated with scattered planting obviously promoted the accumulation of NPK and dry matter in the aerial part of rice plant, especially at early and middle growth stage. Its per unit area NPK and dry matter in panicle increased faster after full heading, and the NPK and dry matter transportation ratio of the stem and leaf was lower and the ratio of the panicle was lower too, the production efficiency of NPK was lower. Its tillers grew rapidly, and per unit area panicles and spikelets were more, so it could make full use of the population dominance and increase the yield.

Key words: rice, seedling culture, scattered planting, nutrient absorption, dry matter accumulation