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邳县陈楼果园1975年定植实生栗苗22.2亩,株行距2×3米.1977年嫁接优良品种.通过冬夏修剪、适时追肥、辅助授粉以及病虫害防治等措施,嫁接第二年即有55.5%植株开花,1979年亩产板栗105.5斤,1980年亩产290斤,1981年高达498.3斤,最高株产9.4斤.这说明板栗良种密植要获得早期丰产还是有可能的.但由于幼树生长旺盛(年生长量达70—80厘米以上),树冠扩展快,结果部位外移迅速,这对板栗丰产又带来不利因素.为了摸索板栗增产的综合措施,我们对短扎、尖顶油栗、九家种三个优良板栗品种在生长期内进行了修剪试验,取得了良好的结果.3
Shexian Chen Lou Orchard in 1975 planted chestnut seedlings 22.2 acres, spacing 2 × 3 meters. 1977 grafted varieties. Through winter and summer pruning, timely top dressing, secondary pollination and pest control and other measures, that is, the second year of grafting 55.5% Plant flowering in 1979, per mu yield of chestnut 105.5 kg, 290 kg per mu in 1980, up to 498.3 kg in 1981, the highest yield of 9.4 kg.This shows chestnut planting close planting to get early high yield is still possible.But as the sapling grows strong (Annual growth of more than 70-80 cm), canopy expansion fast, the results of part of the rapid migration, which brings unfavorable factors chestnut yield.In order to explore the chestnut yield comprehensive measures, we have short bar, spire oil chestnut, nine Three good chestnut cultivars were pruned during the growing season and achieved good results.3