本文選題：引黃灌溉　切入點(diǎn)：土壤　出處：《土壤學(xué)報(bào)》2017年03期 　論文類(lèi)型：期刊論文

【摘要】：土壤有機(jī)質(zhì)組分構(gòu)成是影響土壤有機(jī)碳庫(kù)穩(wěn)定性最直接的原因。為研究灌溉耕作對(duì)不同組分土壤有機(jī)質(zhì)含量變化產(chǎn)生的影響,以寧夏引黃灌區(qū)為研究對(duì)象,通過(guò)密度分組方法,測(cè)定并分析土壤輕組和重組有機(jī)碳含量的變化。結(jié)果表明,經(jīng)過(guò)不同時(shí)間的引黃灌溉耕作后,土壤輕組和重組有機(jī)質(zhì)含量增加,但是不同組分,其變化量之間存在差異。在剖面深度上,土壤輕組和重組有機(jī)質(zhì)含量及其增加量均隨土層深度的增加而降低,表層土壤輕組和重組有機(jī)質(zhì)增加最顯著,土壤有機(jī)質(zhì)組分含量的變化受土壤類(lèi)型的影響明顯。與未受灌溉耕作影響的自然土壤相比,灌溉土壤0~60 cm深度內(nèi)輕組有機(jī)質(zhì)與總有機(jī)質(zhì)間的相關(guān)性增強(qiáng),而且這種相關(guān)性隨土層深度增加而減弱;自然土壤和灌溉土壤剖面各層次重組有機(jī)質(zhì)與總有機(jī)質(zhì)間均有極強(qiáng)的相關(guān)性,說(shuō)明重組有機(jī)質(zhì)是土壤有機(jī)質(zhì)最為重要的組分,但輕組有機(jī)質(zhì)對(duì)灌溉耕作的響應(yīng)更加敏感,重組有機(jī)質(zhì)較輕組有機(jī)質(zhì)具有更好的固碳效果。
[Abstract]:In order to study the effect of irrigation tillage on the change of soil organic matter content in different components, the composition of soil organic matter is the most direct reason to affect the stability of soil organic carbon pool. In order to study the effect of irrigation tillage on the change of soil organic matter content of different components, the Yellow River diversion Irrigation area of Ningxia is taken as the research object. The changes of soil light and recombined organic carbon contents were measured and analyzed. The results showed that the light and recombinant organic matter contents of the soil increased after different periods of irrigation, but different components. In the depth of profile, the content and increase of organic matter of light and recombined soil decreased with the increase of soil depth, and the light and recombined organic matter of surface soil increased most significantly. The change of soil organic matter content was obviously affected by the soil type, and the correlation between the light group organic matter and total organic matter in the 0 ~ 60 cm depth of irrigated soil was stronger than that in the natural soil without the effect of irrigation tillage. Moreover, the correlation decreases with the increase of soil depth, and there is a strong correlation between the total organic matter and the recombined organic matter in the natural soil and irrigated soil profile, which indicates that the recombined organic matter is the most important component of the soil organic matter. But the light organic matter is more sensitive to irrigation tillage, and the recombined organic matter has better carbon sequestration effect than the light organic matter group.
【作者單位】： 土壤與農(nóng)業(yè)可持續(xù)發(fā)展國(guó)家重點(diǎn)實(shí)驗(yàn)室(中國(guó)科學(xué)院南京土壤研究所);蘇州市農(nóng)業(yè)科學(xué)院;中寧縣農(nóng)業(yè)技術(shù)推廣服務(wù)中心;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41501326,41501296) 中國(guó)科學(xué)院戰(zhàn)略性先導(dǎo)科技專(zhuān)項(xiàng)(XDA05050507) 江蘇省博士后基金(1202051C)資助~~
【分類(lèi)號(hào)】：S153.6

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