本文選題：土地利用變化 + 土壤持水性能��； 參考：《應(yīng)用生態(tài)學(xué)報(bào)》2017年12期

【摘要】：熱帶地區(qū)已有大量原始林轉(zhuǎn)變?yōu)槠渌恋乩妙愋?影響了陸地生態(tài)系統(tǒng)的水源涵養(yǎng)功能.為了明確熱帶原始林轉(zhuǎn)變?yōu)槠渌恋仡愋蛯?duì)土壤水源涵養(yǎng)功能的影響,在海南中部山區(qū)選擇4種典型土地利用類型,包括林齡大于100年的原始林(VF)、10年生次生林(SF)、12年生檳榔林(AF)和35年生橡膠林(RF),評(píng)估土地利用變化對(duì)土壤持水性能和水源涵養(yǎng)功能指數(shù)(SWI)的影響.結(jié)果表明:與原始林相比,表層土壤(0~10 cm)中,其他土地類型土壤持水性能指標(biāo)均降低,12年檳榔林各土層指標(biāo)均最低.土壤含水量和最大持水量與植被郁閉度、土壤有機(jī)質(zhì)和土壤容重顯著相關(guān),表明郁閉度、土壤有機(jī)質(zhì)和緊實(shí)度的改變是土壤持水性能變化的重要原因.與原始林相比,次生林、檳榔林和橡膠林土壤水源涵養(yǎng)功能分別減少27.7%、54.3%和11.5%,不同土層的差異各異,橡膠林僅表層土壤水源涵養(yǎng)功能顯著降低.植被郁閉度、土壤有機(jī)質(zhì)和土壤容重可解釋土壤水源涵養(yǎng)功能變量的83.3%.土地利用轉(zhuǎn)變顯著改變了土壤持水性能和土壤水源涵養(yǎng)功能,相比12年檳榔林,35年橡膠林能更好地保持土壤水分,土地管理中增加土壤有機(jī)質(zhì)和減少土壤緊實(shí)度可改善土壤持水性能及水源涵養(yǎng)功能.
[Abstract]:A large number of primitive forests have been transformed into other land use types in tropical regions, which have affected the water conservation function of terrestrial ecosystems. In order to clarify the effect of the transformation of tropical primitive forest into other land types on soil water conservation function, four typical land use types were selected in the mountainous area of central Hainan. The effects of land use change on soil water holding capacity and water conservation function index (SWI) were evaluated, including VFN, 10 year old secondary forest, areca catechu (12 years old) and 35 years old rubber forest. The results showed that, compared with the original forest, the soil moisture retention index of other soil types decreased, and the soil layer index of areca nut forest in 12 years was the lowest in the topsoil soil (0 ~ 10 cm). Soil moisture content and maximum water holding capacity were significantly correlated with vegetation canopy, soil organic matter and soil bulk density, indicating that the changes of canopy, soil organic matter and soil compactness were important reasons for the change of soil moisture retention. Compared with the original forest, the soil water conservation function of secondary forest, betel nut forest and rubber forest was reduced by 27.7% and 11.553%, respectively. The difference between different soil layers was different, and the water conservation function of rubber forest was significantly decreased only in surface soil. Vegetation canopy density, soil organic matter and soil bulk density can explain 83.3% of soil water conservation function variable. Land use change significantly changed soil water holding capacity and soil water conservation function. Compared with areca nut forest of 12 years, 35 years rubber forest can better maintain soil moisture. Increasing soil organic matter and reducing soil compactness in land management can improve soil water holding capacity and water conservation function.
【作者單位】： 中國(guó)科學(xué)院生態(tài)環(huán)境研究中心城市與區(qū)域生態(tài)國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院大學(xué);海南鸚哥嶺國(guó)家級(jí)自然保護(hù)區(qū)管理站;中國(guó)科學(xué)院城市環(huán)境與健康重點(diǎn)實(shí)驗(yàn)室/中國(guó)科學(xué)院城市環(huán)境研究所;廈門城市代謝重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016YFC0503401)資助~~
【分類號(hào)】：S152.7
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本文編號(hào)：1914500