关键词: 桑树（Morus alba L.）, 桑园, 测土配方施肥, 产叶量

Abstract: In view of the poor soil conditions of mulberry （Morus alba L.） gardens in Hubei province and the lack of nutrient elements and imbalances caused by unreasonable use of fertilizers, the soil testing formula optimization fertilization technology system was carried out. Through the soil fertility analysis of the local mulberry garden in Luopoya village,Liulang township,Yunxi county, it was found that the soil nutrient content was moderate, showing a lack of available nitrogen. The three fertilization treatments were formulated as no fertilization, custom fertilization （750 kg/hm² of urea for the whole year） and incremental fertilization （1 500 kg/hm² of urea for the whole year）. The results showed that incremental fertilization significantly improved the mulberry branching ability and promoted the elongation of mulberry branches. The leaf yield per plant, the yield of mulberry leaves per hectare and the quality of mulberry leaves were significantly increased, and the drought resistance of mulberry trees was improved. Moreover, the climatic conditions, such as rainfall, are important factors affecting the nutrient uptake of mulberry trees and the nutrient utilization rate of mulberry trees.

Key words: mulberry（Morus alba L.）, mulberry garden, soil testing and formula fertilization, leaf yield