本文選題：人工降雨 + 土壤侵蝕�。� 參考：《水土保持學(xué)報(bào)》2016年02期

【摘要】：以秦嶺北麓竹峪地區(qū)為研究區(qū)域,采用模擬人工降雨的試驗(yàn)方法,研究了不同坡度(5°,10°)和不同降雨強(qiáng)度(1.1,1.3,1.5mm/min)下該區(qū)域田地土壤磷素流失過(guò)程規(guī)律。結(jié)果表明:降雨強(qiáng)度能夠影響徑流中溶解態(tài)磷(DP)的含量,但二者之間并非呈線性關(guān)系;相比于冪函數(shù)而言,指數(shù)函數(shù)模型更適合模擬秦嶺北麓竹峪地區(qū)土壤徑流溶解態(tài)磷(DP)濃度變化過(guò)程(R~20.75);降雨初期,泥沙中(STP)含量相對(duì)較高,但隨著降雨的延續(xù)其濃度會(huì)有所下降,并最終保持在一個(gè)較穩(wěn)定的水平上;泥沙全磷(STP)的流失速率隨著降雨時(shí)間以冪函數(shù)的形式逐漸遞減,同時(shí)發(fā)現(xiàn)泥沙全磷(STP)的流失速率與土壤流失速率之間存在著明顯的線性關(guān)系(R~2=0.92),說(shuō)明養(yǎng)分流失量累積過(guò)程與產(chǎn)沙過(guò)程一致,可以利用土壤侵蝕狀況來(lái)進(jìn)一步預(yù)測(cè)養(yǎng)分流失狀況。
[Abstract]:Taking Zhuyu area in the northern part of Qinling Mountains as the study area, the process of soil phosphorus loss was studied under the conditions of different slope (5 擄~ 10 擄) and different rainfall intensity (1. 1 ~ 1. 3 鹵1. 5 mm / min) by simulated artificial rainfall. The results show that rainfall intensity can affect the content of dissolved phosphorus (DPN) in runoff, but the relationship between them is not linear, and compared with power function, The exponential function model is more suitable to simulate the variation process of dissolved phosphorus (DPN) concentration in soil runoff in Zhuyu area, northern part of Qinling Mountains, and the content of STP in sediment is relatively high at the beginning of rainfall, but it will decrease with the continuation of rainfall. The loss rate of sediment total phosphorus (STP) decreases gradually with rainfall time in the form of power function. At the same time, it was found that there was an obvious linear relationship between the loss rate of sediment total phosphorus (STP) and the soil loss rate, which indicated that the accumulation process of nutrient loss was consistent with the process of sediment yield, and soil erosion could be further used to predict the nutrient loss.
【作者單位】： 西北農(nóng)林科技大學(xué)資源環(huán)境學(xué)院;農(nóng)業(yè)部西北植物營(yíng)養(yǎng)與農(nóng)業(yè)環(huán)境重點(diǎn)實(shí)驗(yàn)室;西北農(nóng)林科技大學(xué)水土保持研究所;
【基金】：國(guó)家“十二五”科技支撐計(jì)劃項(xiàng)目(2012BAD15B04)
【分類號(hào)】：S157.1

【相似文獻(xiàn)】

相關(guān)期刊論文 前2條

1 孟高良;;秦嶺北麓地區(qū)西安段水土流失治理模式探討及效益分析——從周至縣“農(nóng)發(fā)水�！币黄跍\談秦嶺北麓水土流失治理[J];陜西水利;2012年01期

2 ;[J];;年期

，

本文編號(hào)：2015069