早稻旱床育秧的关键环节是全苗,只有全苗,壮苗壮根才有意义。本文从两个方面谈谈这个问题,以供应用。 1 死苗原因 1.1 干枯死苗:床土发生板结或育秧土铺得太薄;土壤畜水保墒性能差,根系不能下扎,遇到晴天日晒,秧苗干枯死苗;播种过密,单株根系分布范围小,减低秧苗吸水吸肥能力而使秧苗瘦弱死苗;覆土过浅,种籽外露死苗;覆土过深,顶土出苗困 Rice paddy bed early seedling is the key part of the whole seedlings, only the whole seedlings, strong roots and strong roots make sense. This article talks about this issue from two perspectives for application. 1 dead seedlings reason 1.1 dead dead seedlings: bed soil or knot planting seedlings too thin pavement; soil moisture poor performance of the water, the roots can not be under the bar, encounter sunny sun, seedlings dry dead seedlings; sown too dense, single plant Roots of the distribution of small, reducing the ability of seedlings water absorption and absorption of fertilizer seedling thin dead seedlings; over shallow soil, seeds show dead seedlings; overburden too deep, top soil emergence difficulties