Soil Fertility and Mineral N Accumulation of Slope Apple Orchard on the Loess Plateau

YAN Ya-dan; XU Fu-li; ZOU Cheng; WAN Chao

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Soil Fertility and Mineral N Accumulation of Slope Apple Orchard on the Loess Plateau

- Soil Fertility and Mineral N Accumulation of Slope Apple Orchard on the Loess Plateau
- Bulletin of Soiland Water Conservation Vol. 28, Issue 4, Pages: 31-36(2009)
- 作者机构：
  
  1. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
  2. 中国科学院研究生院,北京,100049
  3. 西北农林科技大学, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2009
- 稿件说明：
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YAN Ya-dan, XU Fu-li, ZOU Cheng, et al. Soil Fertility and Mineral N Accumulation of Slope Apple Orchard on the Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2009, 28(4): 31-36.
DOI：

YAN Ya-dan, XU Fu-li, ZOU Cheng, et al. Soil Fertility and Mineral N Accumulation of Slope Apple Orchard on the Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2009, 28(4): 31-36. DOI：

摘要

采用田间取样与室内分析相结合的方法，研究了黄土高原坡地苹果园肥力状况与矿质氮累积。结果表明，坡地苹果园土壤肥力低，氮、磷严重缺乏，钾相对丰富，土壤属于砂壤土，通气性强，保肥、保水性差。0-60cm土层土壤有机质含量为9.24∼28.12g/kg，全氮为0.22∼0.60g/kg，速效磷为0.17∼16.08mg/kg，速效钾为80.06∼168.39mg/kg;黄土高原坡地苹果园中NO

-N有深层累积分布，累积深度大于2m，在180-200cm层最高累积量达249.61kg/hm

，而NH4+-N无深层累积。不同施肥处理对土壤剖面中的NH

-N和NO

-N含量分布影响不同，对NH

-N含量和分布影响不明显，但不同施肥方式对NO

-N含量分布影响显著。施加氮肥促进NO

-N深层累积，施加磷肥有助于降低土层中的NO

-N含量，缩小富集量的分布范围。

Abstract

Soil fertility and mineral N accumulation of slope apple orchard on the Loess Plateau are studied.Results show that soil appears low-fertility due to the serious lack of N and P. Soil is sandy loam，with better soil aeration and poor water and nutrient retention. Fertility status of slope apple orchard on the Loess Plat-eau is low on the whole. The content of soil nutrients of the 0-60 cm soil layer is as follows:organic matter is 9.24-28. 12 g/ kg;total N is 0. 22-0. 60 g/ kg;available P is 0. 17-16. 08 mg/ kg;and available K is 80.06-168.39 mg/ kg. There are NO3- -N enrichment layers below 2 m of slope apple orchard on the Loess Plateau.Different fertilizations have significant effects on the NO3- -N distribution and its content in the soil profiles，while the NH4+ -N distribution and its content were relatively constant.For more N treatment，the NO3- -N enrichment depth increases，while for more P treatment，the NO3- -N enrichment depth decreases in the soil profiles.

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