银杏早播密播培育壮苗技术

采取提前健芽、高密度播种培育银杏实生苗，能使幼苗在高温干旱到来之前就已半水质化，此时苗木叶片已封行，减少水分蒸发，降低床面温度，改善了小气候，有效地促进苗木根系生长，加大地上部分生长量，提高了苗木级别；通过黑网遮荫能防止或减轻苗木颈癌病、叶桔病的发生，提高了成苗率；同时亦提高了土地利用率，节约劳力与农药肥料的用量，从而降低苗木成本。

Sound Seedling Cultivation Technique with Early and Dense Sowing of Ginkgo biloba

Seeding cultivated by early germination hastening and high density sowing could be semi-lignification before the high temperature and dry season. At that time, seedling leaves was already closed and could decrease water evaporation and bed temperature. The improved microclimat promoted root system growth and enlarged growth above-ground, thus seedling grede improved. Black sunshade net could prevent or reduce the occurrence of crown rot and leaf bright to increase survival of seedling. Meantime, land utilization rate was increased, saved labour and pesticide and fertilizer. reduced cost.