本文選題：檸條　切入點(diǎn)：灌叢沙堆　出處：《土壤通報(bào)》2017年05期 　論文類型：期刊論文

【摘要】：為揭示風(fēng)沙區(qū)檸條灌叢沙堆的發(fā)育規(guī)律,并為灌叢沙堆的發(fā)育階段劃分提供參考,對(duì)大、中、小三種檸條(Caragana korshinskii)灌叢沙堆頂部、中部和底部的土壤顆粒組成及分形維數(shù)、土壤有機(jī)碳特征進(jìn)行研究。結(jié)果表明:土壤有機(jī)碳含量隨灌叢沙堆的增大而遞減,與灌叢及其沙堆的外部形態(tài)特征呈顯著性負(fù)相關(guān);隨灌叢沙堆的增大,細(xì)砂含量逐漸增加,粉粒的含量逐漸減少;土壤粒徑分形維數(shù)隨灌叢沙堆的增大而遞減,其與土壤黏粒、粉粒呈顯著性正相關(guān),與細(xì)砂、極細(xì)砂的百分含量呈負(fù)相關(guān);土壤有機(jī)碳含量與土壤粒徑分形維數(shù)之間存在顯著性正相關(guān)。灌叢沙堆具有明顯的空間異質(zhì)性,沙堆上的土壤有機(jī)碳含量與土壤的顆粒組成與沙堆大小具有一定的相關(guān)性,并可作為劃分沙堆發(fā)育階段的標(biāo)準(zhǔn),但需要充分考慮風(fēng)力、植物和沙源等因素的影響。
[Abstract]:In order to reveal the development rule of Caragana korshinskii in wind-sand area, and to provide reference for the division of the development stage of the shrub sand heap, the soil particle composition and fractal dimension of the top, middle and bottom of the shrub sand heap of Caragana korshinskii, three species of Caragana korshinskii, were studied. The results showed that the content of soil organic carbon decreased with the increase of shrub sand pile, and was negatively correlated with the external morphological characteristics of shrub and sand heap, and the content of fine sand increased gradually with the increase of shrub sand heap. The fractal dimension of soil particle size decreased with the increase of shrub sand, which was positively correlated with soil clay and silt, and negatively correlated with the percentage of fine sand and very fine sand. There was a significant positive correlation between soil organic carbon content and fractal dimension of soil particle size. It can be used as the criterion for dividing the developing stage of sand heap, but the factors such as wind, plant and sand source should be taken into account.
【作者單位】： 寧夏大學(xué)西北土地退化與生態(tài)恢復(fù)國(guó)家重點(diǎn)實(shí)驗(yàn)室培育基地;寧夏大學(xué)西北退化生態(tài)系統(tǒng)恢復(fù)與重建教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：寧夏自然科學(xué)基金項(xiàng)目:荒漠草原人工灌木林地下水埋深生長(zhǎng)季的變化規(guī)律及其與降水量關(guān)系(No.NZ15001)資助
【分類號(hào)】：S152.3;S153.6

【相似文獻(xiàn)】

相關(guān)期刊論文 前2條

1 杜建會(huì);嚴(yán)平;丁連剛;俄有浩;朱孟郡;;民勤綠洲不同演化階段白刺灌叢沙堆表面土壤理化性質(zhì)研究[J];中國(guó)沙漠;2009年02期

2 展秀麗;嚴(yán)平;;內(nèi)蒙古太仆寺旗北部地區(qū)不同地表類型~(137)Cs含量及其分布特征[J];土壤學(xué)報(bào);2010年04期

，

本文編號(hào)：1619848