摘要
研究了稻麦两熟地区水稻抛秧栽培中的本田施氮量及配比， 结果表明， 随施 Ｎ 量的增加， 最高苗和有效穗增加， 在 Ｎ 肥配比上， 最高苗和有效穗是底肥足的高； 中 Ｎ 水平和前、中、后搭配施肥的 Ｒ Ｇ Ｒ、 Ｃ Ｇ Ｒ高， Ｎ Ａ Ｒ则在低 Ｎ 下较高； 一次枝梗数基本上不随施 Ｎ量和配比的变化而变化， 低 Ｎ 和中 Ｎ 下二次枝梗数无论在总的分化数还是在现存数、退化数上均基本一样，在高 Ｎ下二次枝梗数比低氮、中氮多分化３～４ 个， 同时也多退化２～３ 个，； 施肥量和配比对穗粒数和千粒重无显著影响；但从产量上看，本试验条件下抛秧栽培的施 Ｎ量应在１３５～１６５ｋｇ／ｈａ 之间， Ｎ肥分配对产量的影响差异不显著， 但从产量趋势看后期施肥是必要的， 且与施 Ｎ 水平有关。
In this paper,nitrogen amount and ways of applying scattered transplanting rice were studied.The results indicated as follows:with the increase of nitrogen quantity,the amount of maximum tillers and effective panicle increased;among three distributes of nitrogen,maximum tillers and effective panicles of B 1 and B 3 were more than those of B 2.RGR and CGR were higher under middle level of nitrogen and a collocation of early,middle and late fertilizer application,but NAR was higher under low nitrogen level.The number of primary branch did not basically change with nitrogen quantity and distribute;under low and middle level of nitrogen,the number of secondary branch was almost the same in total differentiation number,extant number and regressive number,but under the condition of high nitrogen level there were more 3 4 secondary branches and 2 3 secondary retrogressing branches.N level and collocation had no effect on spikelets per panicle and 1000 grain weight.Under the condition of this experiment,135 165kg/ha nitrogen quantity was reasonable in scattered transplanting cultivation.According to mean yield,top dressing at later growth stage was necessary and it was relation to the level of nitrogen application.
出处
《西南农业学报》
CSCD
北大核心
1999年第3期14-20,共7页
Southwest China Journal of Agricultural Sciences
基金
四川省科委 "九五"重点攻关项目
关键词
稻麦两熟
抛秧
施肥
氮麦分配
水稻
栽培技术
scattered transplanting rice
nitrogen fertilizer
nitrogen distribute
rice wheat cropping system
