發(fā)布時間：2018-04-24 15:39

  本文選題：退耕年限 + 林地��； 參考：《北京林業(yè)大學(xué)學(xué)報》2017年01期

【摘要】：植被恢復(fù)可以改善土壤的入滲能力,植被恢復(fù)方式不同及恢復(fù)進(jìn)程中其土壤性質(zhì)的改善對土壤水文特征的影響程度也將影響到植被恢復(fù)的格局。為確定林地、草地植被恢復(fù)年限對土壤水分入滲特征的影響,以黃土丘陵區(qū)西部官山林場退耕后栽植的刺槐林地、撂荒草地為對象,選取退耕年限為9年、15年、25年的林地、草地。于2014年5月對各樣地的原狀土土柱進(jìn)行定水頭入滲,比較不同退耕年限林地、草地的入滲性能和濕潤鋒穿透60 cm土柱的時間,并分析影響入滲特性的因素。結(jié)果表明:退耕年限為25年林地的土壤穩(wěn)定入滲率、平均入滲率、前120 min累積入滲量、濕潤鋒到達(dá)60 cm土柱的時間分別為1.86,2.60 mm/min,387.82 mm,23.00 min;退耕年限為15年林地分別為1.38,1.90 mm/min,288.88 mm,35.33 min;退耕年限為9年林地分別為0.35,1.03 mm/min,194.50 mm,40.00 min;退耕年限為25年草地分別為3.17,3.17 mm/min,386.43 mm,24.00 min;退耕年限為15年草地分別為1.86,2.60 mm/min,387.82 mm,34.33 min;退耕年限為9年草地分別為1.86,2.60 mm/min,387.82 mm,38.33 min。6種樣地的土壤入滲過程均能用通用模型進(jìn)行高精度擬合。各樣地土壤入滲速率與土壤有機(jī)質(zhì)、0.25 mm水穩(wěn)性團(tuán)聚體含量呈正相關(guān)關(guān)系,與土壤密度呈負(fù)相關(guān)關(guān)系。土壤入滲能力隨退耕年限增加而增強(qiáng),退耕還草比退耕還林更有利于土壤入滲能力增強(qiáng)。因此建議在水資源有限的黃土區(qū)以退耕還草為主以促進(jìn)更多的降雨就地入滲。
[Abstract]:Vegetation restoration can improve the infiltration ability of soil. Different vegetation restoration methods and the influence of soil properties on soil hydrological characteristics will also affect the pattern of vegetation restoration. In order to determine the influence of forest land and grassland vegetation restoration years on soil moisture infiltration characteristics, the Robinia pseudoacacia forest land planted in Guanshan Forest Farm in western loess hilly region was taken as the object, and the abandoned grassland was selected as the forest land with 9 years, 15 years and 25 years. The grass. In May 2014, the undisturbed soil column was infiltrated with constant head of water. The infiltration performance of grassland and the time of wetting front penetrating 60 cm soil column were compared with those of forest land with different returning years, and the factors affecting infiltration characteristics were analyzed. The results showed that the stable infiltration rate, the average infiltration rate and the cumulative infiltration amount of the first 120 min were the stable infiltration rate of forest land for 25 years. The time of moisture front reaching 60 cm soil column was 1.86 鹵2.60 mm / min 387.82 mm / min 23.00 min, 15 years forest land was 1.38 88 mm / min ~ 35.33 min, 9 years forest land was 0.35 鹵1.03 mm / min 194.50 mm / min 40.00 min, 25 years grassland was 3.17 ~ 3.17 mm / min ~ 386.43 mm / min 24.00 min, respectively; The soil infiltration process of the grassland with a 15-year limit of 1.86 ~ 2.60 mm / min ~ 387.82 mm / min ~ 34.33 min and 9 years with a yield of 1.86 ~ 2.60 mm / min ~ 387.82 mm / m ~ 38.33 min.6 can be fitted with a general model. Soil infiltration rate was positively correlated with soil organic matter content of 0.25 mm and negatively correlated with soil density. The ability of soil infiltration increased with the increase of the number of years, and the ability of returning farmland to grassland was better than that of returning cropland to forest. Therefore, it is suggested that in the loess area with limited water resources, the conversion of farmland to grass should be given priority to in order to promote more rainfall infiltration in situ.
【作者單位】： 西北農(nóng)林科技大學(xué)水土保持研究所;中國科學(xué)院水利部水土保持研究所;
【基金】：國家自然科學(xué)基金項目(41471439、41171421)
【分類號】：S152.7

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 白丹,李占斌;應(yīng)用遺傳算法擬合渾水入滲經(jīng)驗公式[J];農(nóng)業(yè)工程學(xué)報;2003年03期

2 樊惠芳,羅碧玉;渾水膜縫入滲規(guī)律試驗研究[J];楊凌職業(yè)技術(shù)學(xué)院學(xué)報;2003年04期

3 張娟娟,劉恩民,鄭麗萍;土壤經(jīng)驗入滲指數(shù)的移動窗口統(tǒng)計特性[J];地下水;2004年03期

4 吳軍虎,費良軍,李懷恩;灌施條件下波涌灌溉土壤間歇入滲硝態(tài)氮運移特性試驗研究[J];灌溉排水學(xué)報;2004年05期

5 張雅楠;黃興法;毛麗麗;劉汗;;土壤入滲性能自動測量系統(tǒng)原理與應(yīng)用研究[J];農(nóng)業(yè)工程學(xué)報;2007年04期

6 張建豐;王文焰;賈中華;;具有砂質(zhì)夾層的土壤連續(xù)函數(shù)入滲模型[J];水土保持學(xué)報;2007年04期

7 卞艷麗;曹惠提;黃福貴;侯愛中;;渾水灌溉下的土壤入滲規(guī)律研究[J];水利科技與經(jīng)濟(jì);2009年08期

8 盧修元;魏新平;邱s，

本文編號：1797241