世界竹藤通讯Issue(6)：14-18,5.
覆盖栽培雷竹林土壤钾养分变化特征
Variation Characteristics of Potassium Nutrients in Soil of Mulched Phyllostachys Praecox Stands
摘要
Abstract
This paper dealt with a study on the effects of mulched Phyllostachys praecox stands on the potassium nutrient state in soils in Fenghua County, Zhejiang Province, in China, in the condition of intensive management and by adopting the principle of fixed monitoring in different cultivated manner, especially in mulching years, in similar climate and soil texture. The results showed that there existed obvious variations of the total potassium and available potassium in soils of cultivated Ph. praecox stands. The variation range of the contents of total potassium was 12.5~34.24 g/kg, while the variation range of available potassium content was 37.55~492.34 mg/kg, It appeared that there existed a wild variation of available potassium, whereas the change about total potassium was smaller. The contents of total potassium increased with mulching years by the end of ten years; in comparison, the available potassium increased very obviously after three-time mulching or six years later.It was very interesting that the content of the total potassium declined in the soil of the stands ten years later, while available potassium in the mulched stands declined only after eight years compared to those non-mulched ones. The smaller variation of the content of total potassium may result from converting or changing the physical and chemical environment and the process of the mineral of organic matter of mulching materials and soil components. From the point of variation trends of potassium nutrients in soil fertility, the years of mulching cultivation was limited, approximately more than ten years. Under the condition of mulching frequency, when it was three or four times, the number should be reduced or the frequency should be better measured, so as to maintain stability and improve potassium nutrients condition in the soil of Ph. Praecox stands.关键词
雷竹林/土壤钾素/变化特征/覆盖栽培Key words
Phyllostachys praecox stands/soil nutrients/potassium/variation characteristics/mulching cultivated分类
农业科技引用本文复制引用
高志勤,陈志平..覆盖栽培雷竹林土壤钾养分变化特征[J].世界竹藤通讯,2011,(6):14-18,5.基金项目
supported by the Natural Science Foundation of Ningbo （）
2008’ research program of Education Department of Zhejiang province （）
2010’ research plan of Ningbo Forestry Bureau ： Technique of regenerate and rejuvenation on the Deteriorated Bamboo Shoot of phyllostachys praecox Stands （）
