發(fā)布時(shí)間：2018-03-13 04:06

  本文選題：紫色土　切入點(diǎn)：土壤侵蝕　出處：《四川農(nóng)業(yè)大學(xué)學(xué)報(bào)》2017年03期 　論文類(lèi)型：期刊論文

【摘要】：【目的】探索土壤侵蝕強(qiáng)度與磁化率(MS)之間的關(guān)系,為利用磁測(cè)法研究紫色土坡面侵蝕提供理論依據(jù)�！痉椒ā客ㄟ^(guò)土壤侵蝕序列方法,研究川中丘陵區(qū)紫色土在坡面侵蝕過(guò)程中基本理化性質(zhì)與磁化率(MS)的演變特征�！窘Y(jié)果】結(jié)果表明,隨土壤侵蝕強(qiáng)度的增加,坡頂和坡中土壤基本理化性質(zhì)的演變特征存在差異,坡中土壤要比坡頂土壤復(fù)雜。在坡頂以0~20 cm土壤層為主要營(yíng)養(yǎng)物流失層,在坡中則以0~40 cm為主。不同侵蝕強(qiáng)度土壤與未侵蝕土壤相比較,只有坡頂土壤中有機(jī)質(zhì)(SOM)的含量和坡中土壤全鉀(TK)的含量達(dá)到顯著差異,而土壤中其他的養(yǎng)分含量均未達(dá)到顯著差異。土壤侵蝕對(duì)紫色土SOM、N和P的保存不利。表層土壤的MS隨土壤侵蝕強(qiáng)度的增加有所下降,但并沒(méi)有呈現(xiàn)出固定的模式,在本研究區(qū)很難借助MS來(lái)反演紫色土的侵蝕過(guò)程�！窘Y(jié)論】川中丘陵地區(qū)土壤侵蝕主要體現(xiàn)在坡中,其次是坡頂,且土壤肥力受到顯著影響。因此,應(yīng)在該地區(qū)水土保持與生態(tài)修復(fù)時(shí)因地制宜選擇適合的側(cè)重點(diǎn)。
[Abstract]:[objective] to explore the relationship between soil erosion intensity and magnetic susceptibility (MS), and to provide a theoretical basis for the study of purple soil slope erosion by magnetic measurement. [methods] soil erosion sequence method was used. The evolution characteristics of the basic physicochemical properties and magnetic susceptibility (MSS) of purple soil in the middle of Sichuan hilly area during slope erosion were studied. [results] the results showed that with the increase of soil erosion intensity, the evolution characteristics of the basic physicochemical properties of the top and middle slope soil were different. The soil in the slope is more complex than that in the top of the slope. The soil layer of 0 ~ 20 cm is the main nutrient loss layer at the top of the slope, and the soil layer is mainly 0 ~ 40 cm in the slope. The soil with different erosion intensity is compared with the soil without erosion. Only the content of organic matter (SOM) in the top of the slope and the content of total potassium in the soil in the slope were significantly different. Soil erosion was unfavorable to the conservation of SOMN and P in purple soil. The MS of surface soil decreased with the increase of soil erosion intensity, but it did not show a fixed pattern. In this study area, it is difficult to invert the erosion process of purple soil by MS. [conclusion] soil erosion in the hilly area of central Sichuan is mainly reflected in the slope, followed by the top of the slope, and the soil fertility is significantly affected. In this area, soil and water conservation and ecological restoration should be selected according to local conditions.
【作者單位】： 內(nèi)江師范學(xué)院地理與資源科學(xué)學(xué)院;西北大學(xué)城市與環(huán)境學(xué)院;
【基金】：國(guó)家自然科學(xué)基金青年科學(xué)基金項(xiàng)目(No.41401235) 國(guó)家級(jí)大學(xué)生創(chuàng)新實(shí)驗(yàn)項(xiàng)目(No.X201306)
【分類(lèi)號(hào)】：S157.1
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本文編號(hào)：1604713