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我国南方稻区稻田用种量一般为每亩25—30斤,比之国外先进国家稻田用种量(每亩6—70斤)高2—3倍。近年来四川、湖南等省进行了中,晚稻稀播培育多蘖壮秧大幅度省种栽培的研究,将每亩用种量降至10斤左右,并正在逐步示范推广。若将此项措施用于早稻,仅我省每年可节省种谷3—4亿斤,但一般认为稀播技术用于早稻,可能性很小,其理由是:①早稻育身时气温低、秧令短,即使稀播,秧田分蘖少,且多为小分蘖(即分蘖叶片少),插后难成活。②若推迟播、插期,促使秧田多分蘖,将会导致早稻迟熟,影响后季
The rice in paddy fields in southern China is generally 25-30 kg per mu, which is 2-3 times higher than that of rice from advanced countries in foreign countries (6-70 kg per mu). In recent years, Sichuan, Hunan and other provinces were carried out in the late rice thinning sowing more tiller seedlings significant provincial cultivation studies, the amount per acre will be reduced to about 10 kg, and is gradually demonstration and promotion. If this measure is applied to early rice, only 3-4 billion jin of grain will be saved in our province each year. However, it is generally considered that the use of thinning and sowing technology for early rice is very unlikely due to the following reasons: (1) Seedlings make a short, even thin sowing, tiller less seedling, and mostly small tillers (ie less tiller leaves), difficult to survive after insertion. ② If the delayed broadcast, plug-in, to promote more tillering seedling, will lead to late ripening of early rice, affecting the latter quarter