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南充地区常年约百万亩稻田由于施肥不足或土壤保肥力较差等,致使抽穗后养分不足发生脱肥早衰,严重影响杂交中稻单产的进一步提高。为了提高结实率和千粒重,地区农技站1983年组织各县农技站对杂交中稻看苗施粒肥作了大区对比试验。结果表明,杂交中稻看苗施粒肥比不施的增产7—11％。这一增产技术至1985年在全区已推广48.4万亩。一、看苗施粒肥的作用。杂交中稻看苗施粒肥的作用主要表现在结实率提高,千粒重增加。施粒肥比不施的穗实粒数
Due to inadequate fertilization or poor soil fertility, about one million mu of rice paddy fields in Nanchong are perennial affected areas, resulting in insufficient fertilization after heading, which will seriously affect the yield increase of hybrid mid-season rice. In order to improve the seed setting rate and 1000-grain weight, the regional agro-technical stations were organized in 1983 to compare the agro-technical stations of the prefectures in the region. The results showed that the seedling fertilizer of hybrid medium rice seedling increased 7-11% compared with that of non-application. This increase in production technology in 1985 to promote 48.4 acres in the region. First, see Miao Shi granulation role. The effect of seedling fertilizer on seedling medium hybrid rice was mainly manifested in the improvement of seed setting rate and the increase of 1000-grain weight. Fertilizer fertilizer than the number of spike grains