本文選題：土壤　切入點：氮素　出處：《西南林業(yè)大學(xué)學(xué)報(自然科學(xué))》2017年05期 　論文類型：期刊論文

【摘要】：為了合理利用坡耕地,防止種植過程中產(chǎn)生水土流失、保持土壤肥力,在松華壩水源區(qū)迤者小流域設(shè)置標準徑流小區(qū),布設(shè)以控制水土流失為目的等高反坡階試驗,探討等高反坡階土壤氮含量年動態(tài)變化規(guī)律。結(jié)果表明:氮素流失量與地表徑流量和泥沙產(chǎn)量顯著相關(guān),設(shè)置等高反坡階對地表徑流量的削減率9.68%~36.84%,平均削減率23.54%,對土壤侵蝕量的削減率40.98%~71.68%,平均削減率56.62%;雨季后對比發(fā)現(xiàn),布設(shè)等高反坡階的土壤全氮含量較對照高53.97%;對照地土壤水解氮含量消減率42%,等高反坡階地土壤水解氮含量消減率25%,兩者差異顯著。說明設(shè)置等高反坡階能有效減少氮素流失,保持土壤氮素含量,并減少坡耕地地表徑流導(dǎo)致的土壤流失。
[Abstract]:In order to make rational use of sloping farmland, prevent soil erosion and maintain soil fertility during planting, a standard runoff plot was set up in the small watershed of Yiyi River Source area of Songhua Dam, and a high slope scale test was set up to control soil and water loss. The annual dynamic change of soil nitrogen content was studied. The results showed that the amount of nitrogen loss was significantly related to surface runoff and sediment yield. The reduction rate of surface runoff is 9.68%, the average cutting rate is 23.54, the reduction rate of soil erosion is 40.98% and 71.68%, and the average reduction rate is 56.62% after the rainy season. The soil total nitrogen content was 53.97 higher than that of the control, the soil hydrolysate nitrogen abatement rate was 42% and the soil hydrolytic nitrogen content reduction rate was 25% in the control land. The difference between them was significant. Maintain soil nitrogen content and reduce soil loss caused by surface runoff on sloping farmland.
【作者單位】： 西南林業(yè)大學(xué)環(huán)境科學(xué)與工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(30660037)資助 云南省高校優(yōu)勢特色重點學(xué)科(生態(tài)學(xué))建設(shè)項目資助
【分類號】：S153.6

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1 范厚明,付業(yè)春;試論反坡梯土在水土保持中的地位和作用[J];中國農(nóng)學(xué)通報;2004年02期

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本文編號：1566159