發(fā)布時間：2019-01-04 22:25

【摘要】：采用7級目測法對浦陽江下游江岸草本植物進(jìn)行了調(diào)研,篩選出了當(dāng)?shù)氐膬?yōu)勢草本,并對其根系密度、土壤抗沖性增強(qiáng)效應(yīng)進(jìn)行了分析,補(bǔ)充了植物根系對江岸土壤抗沖性影響的基礎(chǔ)資料。研究發(fā)現(xiàn):(1)浦陽江下游江岸的優(yōu)勢草本植物是狗牙根、水蓼、蘆葦、芒、雙穗雀稗;(2)5種草本植物根系(d≤1.0mm)在土壤表層(0—30cm)均有較多分布,根系密度隨著土層的垂直分布深度增加而減少,其規(guī)律服從指數(shù)函數(shù)關(guān)系分布;(3)5種優(yōu)勢草本根系均能增強(qiáng)浦陽江下游江岸土壤的抗沖性,增強(qiáng)值分別如下:蘆葦14.16,芒12.53,狗牙根5.39,雙匯雀稗5.01,水蓼4.41。5種優(yōu)勢草本均能在浦陽江消落帶植被構(gòu)建中發(fā)揮土壤抗沖性增強(qiáng)效應(yīng),尤其是蘆葦與芒的增強(qiáng)效應(yīng)最為明顯。
[Abstract]:Based on the investigation of herbaceous plants in the lower reaches of Puyang River by 7 grade visual test, the dominant herbaceous plants in Puyang River were screened out, and their root density and soil anti-scour enhancement effects were analyzed. The basic data of the effect of plant roots on the soil scour resistance of river banks were supplemented. The main results are as follows: (1) the dominant herbaceous plants in the lower reaches of Puyang River are Phyllostachys davidii, Polygonum hydropiper, Reed, awns, and Paspalum paspalum; (2) the root system (d 鈮，

本文編號：2400868