發(fā)布時(shí)間：2018-09-18 09:39

【摘要】：2015年,以江蘇省南京老山國家森林公園的杜仲Eucommia ulmoides林,麻櫟Quercus acutissima林,毛竹Phyllostachys heterocycla‘Pubescens林’,黑松Pinus thunbergii林4種林分類型為研究對(duì)象,建立樣方對(duì)其不同層次土壤進(jìn)行測定。選取土壤容重、有機(jī)質(zhì)含量、團(tuán)聚體特征、抗剪切強(qiáng)度等15個(gè)指標(biāo)來評(píng)估不同林分土壤的抗侵蝕性能。結(jié)果表明,相比其他3種林型,麻櫟林在諸多指標(biāo)上均表現(xiàn)最優(yōu);基于主成分分析法對(duì)15個(gè)指標(biāo)進(jìn)行篩選,其中有機(jī)質(zhì)含量、內(nèi)摩擦角、粉粒含量、砂粒含量可以作為評(píng)價(jià)研究區(qū)土壤抗侵蝕性能的最優(yōu)指標(biāo);基于最優(yōu)指標(biāo)和加權(quán)平均法對(duì)各林分土壤抗侵蝕性能進(jìn)行綜合評(píng)價(jià),結(jié)果表明麻櫟林表層土壤的抗侵蝕性能最強(qiáng),其次為杜仲林,再次為黑松林,毛竹林最弱。
[Abstract]:In 2015, four forest types of Eucommia ulmoides forest, Quercus acutissima forest, Phyllostachys pubescens Phyllostachys heterocycla'Pubescens forest and black pine Pinus thunbergii forest in Laoshan National Forest Park, Jiangsu Province, were studied. Soil bulk density, organic matter content, aggregate characteristics and shear strength were selected to evaluate the soil erosion resistance of different stands. The results showed that, compared with the other three forest types, Quercus acutissima forest had the best performance on many indexes, and selected 15 indexes based on principal component analysis, including organic matter content, internal friction angle, silt content, etc. The sand content can be used as the best index to evaluate the soil erosion resistance in the study area, and based on the optimal index and the weighted average method, the soil erosion resistance of each stand is evaluated. The results show that the surface soil of Quercus acutissima forest has the strongest resistance to erosion. Next is the Eucommia ulmoides forest, again is the black pine forest, the Phyllostachys pubescens forest is the weakest.
【作者單位】： 南京市環(huán)境保護(hù)科學(xué)研究院;
【基金】：南京市重金屬污染現(xiàn)狀及防治對(duì)策研究(201104)
【分類號(hào)】：S714.7

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