Studies On Key Cultivation Technology Of Anti-drought And High-yielding Of Chestnut

The excellent species of chestnut was used as materials in this paper and field trails were conducted in Huairou Mount District in order to study drought resistance , high-yield cultivation techniques of chestnut in Peking.Yearly changing soil water content of chestnut was surveyed to find the techniques as follows: Spraying high-effective fertilizer—"Shi feng le" on the crown; combining different mode of tillage and cultivation; meanwhile studying the coupling between water and fertilizer,Economical and excellent effect technique was expected to find by analyzing effects of different techniques on chestnut, it wound be technical and theoretical foundation of increasing drought resistance and yield of chestnut under natural rainfall.Yearly changing soil water content of chestnut under different mode of tillage and cultivation shows "single-peak" curves. Among the changes, a small peak value occurs in budding stage, the biggest peak value occurs in blooming stage. Under autumn plastic film covering , spring plastic film covering and fresh weed covering ,soil water content had a much higher value, higher water utilization efficiency was occurred in both budding stage and fruit expand stage.The results show: Two key water requirement periods of chestnut are budding stage and fruit expand stage, because trees in these stages are sensitive to water. It is crucial to use techniques .Spraying 10mg/l, 20mg/l and 30mg/l high-effective fertilizer—"Shi feng le" solution on the crown to increase drought resistance and yield of chestnut, use water as CK.Underground used 5 different modes of tillage and cultivation(autumn plastic film covering , spring plastic film covering, autumn deepening, pure tillage)as treatments.