导　　师： 翟丙年

学科专业： 0903

授予学位： 硕士

作　　者： ;

机构地区： 西北农林科技大学

摘　　要： 为了摸清旬邑县农田土壤肥力状况，本研究通过对全县2225个农地和1040个苹果园土壤样品的测定分析与评价，获得如下主要结论： 1．旬邑县农田土壤有机质含量处于中等偏下水平，与第二次土壤普查结果相比，提高了26.1/%；苹果园土壤有机质平均含量为12.3g·kg-1，主要集中在Ⅲ~Ⅳ级之间，处于中等偏下水平。 2．旬邑县农田土壤全N、碱解氮含量处于中等偏下水平，与第二次土壤普查结果相比，前者降低了4.58/%，后者提高了17.6/%。98.5/%的果园土壤全N含量集中在Ⅱ~Ⅲ级，处于中等偏上水平，大部分处于较丰富状态。 3．旬邑县大部分农田土壤有效磷和速效钾含量处于中等及以上水平，与第二次土壤普查的结果比，二者分别提高了159.4/%和0.6/%。75/%果园土壤速效P含量集中在Ⅲ~Ⅳ级，大部分处于中等偏下水平；88.5/%的速效钾含量集中在Ⅱ~Ⅲ级，91.2/%的含量处于Ⅰ~Ⅲ级，绝大部分处于中等偏上水平。 In order to find out the soil fertility status of XunYi county, by the analysis andevaluation of measurement of soil samples of2225agricultural land and1040apple orchard,this study obtain the following main conclusions: 1. The soil organic matter content of XunYi County is In the middle level, increased26.1/%, compared to the results of the second soil survey; the average content of soil organicmatter in the apple orchard is12.3g·kg-1, mainly concentrated in grade III-IV, among lowermiddle level. 2. Soil total N, nitrogen content of XunYi County is in the middle and lower level,compared to the results of the second soil survey, the previous decreased4.58/%, and the latterincreased17.6/%.98.5/%of the orchard soil total N content concentrated in grade II-III, that isto say, in the middle level, the majority in a relatively rich state. 3. Most of soil phosphorus and potassium content of XunYi County is in the middle andhigher level, compared to the results of the second soil survey, they increased respectively159.4/%and0.6/%.75/%of the orchard soil available P content concentrated in grade III-IV,the majority in the middle level;88.5/%of the K content concentrated in grade II-III,91.2/%in grade I-III, the vast majority in the middle level.

关 键 词： 土壤肥力 农田 果园 分析与评价

分 类 号： [S158]

领　　域： [农业科学] [农业科学]