The Study On Soil Nutrient Status And Regionalized Fertilizing Strategy In Phvllostachvs Edulis Forest

Phyllostachys pubescens is one kind of bamboos, which with the widest distribution, largestcovering area, and highest utility values, gather with the economic, ecologic, and social benefits on itsgrowing area and the income of the farmers. As the rising of intensification management, the way offertilizing was also changed from the traditional experience to more scientific fertilization of soil testing.On the base of soil analysis, this paper used the method of two-grade regionalization to put forward thebamboo forest's regionalized fertilizing method, according to the difference of the bamboo forest's soilnutrient which the different land management led to in Qujiang and Longyou. Main conclusions were asfollows：1, Through regional heterogeneity analysis, we finded that the soil nutrient had significant difference,except available K. These contest the regional heterogeneity was significant, also both the soil nutrientand acidity in Qujiang were higher than Longyou.2, According to the soil richness index, we concluded that Longyou was lacking of nutrients, except theslow dissolving organic matter. So, the soil needed more fertilization in N, P, K and land preparationworks to improve soil quality. Meanwhile, the soil in Qujiang was abundant with total nitrogen andorganic matter, while lacking of P and available K. In this climate, we could decrease the usage of Nnutrient, while increase the fertilization of P.3, According to the soil richness index, the soil nutrients(i.e. N,P,K) in Longyou county could bedivided into2,2,1,2,2sub-zones, While Qujiang district could be divided into1,2,2,1,1sub-zones.Through the cluster analysis, the6measurements sites could be divided into3groups. The first containsYangjiashan, Mafudun, Shankeng, Jishang. Xikou was the second one and Fenglin was the third one.The four plots in Qujiang district could be fertilized with2divided groups. Shuangqiao withhalf-intensive management was the first group, while Quanwang, Hunan,Duze which were managedwith fully intensity was the second group.4, Intensive management in Qujiang district and Longyou county could significantly increase the Ncontents in the soil.5, According to the empirical study on the regionalized fertilizing of bamboo's forest in qujiang, wecould conclude that regionalized fertilizing, which compare with traditional method, cost much moneyin fertilizer and more labor in fertilization and bamboo shoots' harvest. However, the output and valueof Phyllostachys edulis had dramatic increased。Among them, winter bamboo shoots' output valueincreased by more than180percent, whose spring bamboo shoots and bamboo wood increased by81.81percent and68.16percent. It showed that recommend fertilizer technology measures was adapt tolocal condition from the respect of economy, which could produce high economic returns.