据試驗春小麦每亩施用硫酸銨10斤作种肥,平均可增产25.9%;用鸡粪干5斤碾碎作种肥也能增产7.4%。其增产原因是:1.种肥施在种子沟(或穴)內,肥力集中,肥效大。2.种肥有壮苗的作用。由于种子发芽出苗时幼根还不健全,不能从土壤中吸收养分,这时所需养分是由胚乳供給的。到幼苗出土 According to the experimental spring wheat per acre 10 kg of ammonium sulfate as seed fertilizer, an average increase of 25.9%; with chicken manure 5 kg crushed as seed fertilizer can increase 7.4%. The reasons for the increase is: 1. The kind of fertilizer applied in the seed ditch (or hole), fertility, fertility. 2. Fertilizer has a strong role of seedlings. As seedling sprouting seedling emergence is not perfect, can not absorb nutrients from the soil, then the required nutrients are provided by the endosperm. To the seedlings unearthed