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疏播培育多蘖壮秧是杂交水稻重要的增产技术措施之一。可是育秧工作量大,疏播有一定的限度;由于秧田后期郁闭和移植损伤,插后禾苗往往发生规律性的分蘖缺位,以后产生的分蘖,多为高位高次分蘖,因而穗短粒少,结实率低,不能充分发挥杂交水稻的优势;双季稻区早春播种还常遇低温阴雨发生烂秧。为克服这些缺陷,我们从1981年早造开始摸索小温室育秧小苗直插技术,现以1986年试验结果为主综合报道如下。
It is one of the important measures to increase yield of hybrid rice by cultivating multiple tillers and strong seedlings by planting. However, the large amount of seedling cultivation, there is a certain degree of dispersal of sowing; late seedling due to canopy and transplant injury, seedlings often after the insertion of the regular occurrence of tillering absence, after tillering, mostly high tiller, so short spike Less, low seed setting rate, can not give full play to the advantages of hybrid rice; double cropping of rice in early spring often met low temperature rainy rotten seedlings. To overcome these shortcomings, we began to grope in early 1981 to plant seedlings in small greenhouse in-line technology, now based on the 1986 trial results are reported as follows.