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杂交水稻的大面积推广,为我省水稻增产出了大力。但杂交水稻有它的独特栽培方法:本田用种量和秧田播种量都很少,要求以蕖代苗,单本或少本栽插,以降低成本,并发挥其根系强大、分蘖多而快,大穗多粒的优势。由于杂优秧苗要求稀播壮秧,单株营养面积很大,加之,杂交水稻大多作一、二晚栽培,播种时正处在光、温条件良好季节,因此,杂优秧田常易发生杂草孳生,往往草苗同长,互争水、肥、阳光,影响了秧苗生长发育而达不到矮壮多蘖的目的。同时,二晚杂优秧苗,在秧田的生长期较长,杂草一多,又给拔秧,洗秧、栽禾等工序增加很大困难.因
The large-scale popularization of hybrid rice has greatly boosted rice yield in our province. However, hybrid rice has its unique cultivation methods: Honda with seedling and seeding rate are seldom required to seedlings on behalf of Miao, single or a small planting, in order to reduce costs and play a strong root system, tillers and more fast The advantages of large spike and more grain. As the hybrid seedlings require thin planting strong seedlings, single plant large area of ?? nutrition, coupled with most of hybrid rice cultivation for one or two nights, planting is in the light, warm conditions in good season, therefore, miscellaneous seedling often prone to miscellaneous Grass breeding, grass and grass often with the length of mutual competition water, fertilizer, sunlight, affecting the growth and development of seedlings and less than short and strong tiller purposes. At the same time, two late hybrid rice seedlings in the seedling growth period longer, more than one weed, but also to pull rice, washing seedlings, planting Wo and other processes to increase very difficult.