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黄土塬区土地利用变化对深剖面 土壤水分的影响
向 伟1; 林雪青1; 张志强1; 李 志1,2
Source Publication干 旱 地 区 农 业 研 究

在长武塬区的6 个地点分别采集农地、10 年果园和20 年果园10 m 深剖面的土样,通过测定和分析不
同样地的土壤水分,定量揭示其对土地利用变化的响应。结果表明:农地和 10 年果园土壤水分具有相似的垂向分
布,随深度增加土壤水分含量增大,而20 年果园随深度增加呈减小趋势,但6 m 以下3 种样地土壤水分随深度增加
基本不发生变化;农地、10 年和 20 年果园在 0 ~6 m、6 ~ 10 m 和 0 ~ 10 m 土层平均土壤水分含量分别为 17. 8%、
17. 5%和 15. 8%,20. 4%、20. 6%和 14. 8%,18. 8%、18. 7% 和 15. 4%,与农地相比,20 年果园 0 ~6m、6 ~10m 和 0
~10 m 土层减少的土壤水分分别占农地的 11%、27%和 18%;农地 6 ~10 m 土壤储水量为 1 063 mm,而转化为果
园后随果龄增大而减小,其中 10 年果园无明显差异,但20 年果园减少了 291 mm,在该土层形成稳定的低湿层。20
年果园 6 m 以下稳定的低湿层可能减少水分的深层渗漏进而降低地下水补给量,伴随着大面积的农地转化为人工

Other Abstract

 10 m soil profiles were sampled fromthree representative land-use types (farmland,apple orchard
about 10 years old and 20 years old) at six sites on the Changwu loess tableland. In this study,soil water content
wasmeasured and a quantified analysiswas conducted to evaluate the effect of farmland that had been converted to
apple orchard for 10 years and for 20 years. Results showed that there was an increasing trend in soil water content-
with the increase ofdepth in farmlands and apple orchards about 10 years old,but the trend was remarkably differ-
ent inapple orchard about 20 years old. In 6 ~ 10 m layer,soil water contents in three land-use types weresimi-
larlystable withdepthincrease. The average soil water content in 0 ~ 6 m,6 ~ 10 m and 0 ~ 10 m layers in three
land-use types were 17. 8%,17. 5% and 15. 8% (farmland),20. 4%,20. 6% and 14. 8% (10 years old or-
chard),and 18. 8%,18. 7% and 15. 4% (20 years old orchard),respectively. Compared with farmlands,the
average soil water contents at 0 ~6 m,6 ~10 m and 0 ~0 m layers in apple orchard about 20 years oldwere de-
creased by 11%,27% and 18%,respectively. The average soil water storage at 6 ~10 m layerin farmlands was 1
063 mm,but the conversion to apple orchardsfor 20 years reduced soil water storage by 291 mm. Land-use change
had a significant impact on deep soil water,which probably reducedthe deep percolationofwater and further affected
groundwater recharge. Conversion of farmland to grasslands and forests is one of the main types of land-use changes
on the Loess Plateau,which may further alter regional hydrologic cycle.

Keyword土壤水分 土地利用变化 苹果园 深剖面 黄土高原
Indexed By中文核心期刊要目总览
Document Type期刊论文
Affiliation1.西北农林科技大学资源环境学院,陕西 杨凌 712100
2.黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西 杨凌 712100
Recommended Citation
GB/T 7714
向 伟,林雪青,张志强,等. 黄土塬区土地利用变化对深剖面 土壤水分的影响[J]. 干 旱 地 区 农 业 研 究,2016,34(4):12-17.
APA 向 伟,林雪青,张志强,&李 志.(2016).黄土塬区土地利用变化对深剖面 土壤水分的影响.干 旱 地 区 农 业 研 究,34(4),12-17.
MLA 向 伟,et al."黄土塬区土地利用变化对深剖面 土壤水分的影响".干 旱 地 区 农 业 研 究 34.4(2016):12-17.
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