西藏人工造林作业区土壤肥力评价

发布时间：2018-02-13 12:50

  本文关键词： 土壤肥力 土壤属性 造林作业区　出处：《应用生态学报》2017年05期 　论文类型：期刊论文

【摘要】：为了掌握西藏将要造林作业区的土壤肥力水平,对6个地市524个造林作业区的土壤样本进行了养分测定,采用改进的内梅罗综合指数法分析土壤肥力水平.结果表明:西藏造林作业区土壤综合肥力指数为0.425~1.972,土壤综合肥力水平一般的作业区数量占64.9%,贫瘠的占34.9%,肥沃的占0.2%.各属性分肥力指数均值表现为:碱解氮pH全氮速效钾有机质有效磷全磷全钾,指数值为0.654~2.643,全氮、碱解氮的肥力水平主要为肥沃、很肥沃,速效钾、有机质、全磷的肥力水平主要为一般,有效磷、全钾的肥力水平主要为贫瘠,土壤酸碱度适宜.各地市造林作业区平均土壤综合肥力指数表现为:林芝市昌都市山南市拉萨市日喀则市阿里地区,其中,阿里地区、日喀则市、拉萨市造林作业区土壤综合肥力水平为贫瘠,昌都市、林芝市为一般,而山南市一般和贫瘠的数量相当.西藏造林作业区土壤综合肥力水平总体偏低,土壤综合肥力、土壤各属性肥力水平由西北部的阿里地区至东南部的林芝市逐渐趋好,具有明显的水平地带性规律.
[Abstract]:In order to grasp the Tibet will be the level of soil fertility of afforestation area, soil samples of 6 cities in 524 afforestation area were nutrient determination, analysis of soil fertility by Nemero index improved. The results showed that: the soil of Tibet afforestation area comprehensive fertility index was 0.425~1.972, the number of operation area of the integrated soil fertility level general accounting for 64.9%, accounting for 34.9% of the poor, rich 0.2%. fertility index for each attribute mean performance: n pH N K organic phosphorus total potassium and total phosphorus, the index value is 0.654~2.643, total nitrogen, available nitrogen fertility levels are very rich and fertile, available potassium, organic matter the fertility level of total phosphorus, mainly for general, available phosphorus, total potassium fertility level is mainly poor, soil pH is suitable for afforestation area around the city. The average soil fertility index showed: Linzhi city Chang City Lhasa City, Shigatse City, Ali, which Ali District, Shigatse City, Lhasa city afforestation area soil fertility level is poor, Chang City, Linzhi City, South City and quite general and poor. The number of Tibet integrated soil fertility level of afforestation area is generally low, soil fertility, soil attribute fertility from northwest to Southeast of the Ali area of Linzhi city is getting better, with regular horizontal zonality obviously.

【作者单位】： 中国林业科学研究院资源信息研究所;西藏自治区林业调查规划研究院;
【基金】：西藏自治区2016年度重点区域生态公益林建设工程项目 西藏重点区域造林工程生态效益监测和评估项目资助~~
【分类号】：S714.8
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本文编号：1508202