论文部分内容阅读
以河北省平山县下峪村新垦地土质坡面为试验地,采用单播、混播2种模式进行播种,研究了几种草本植物在太行山片麻岩山地的生长特性及水土保持效益。结果表明:皇竹草发芽最快,发芽时间为3d,波斯菊次之,发芽最晚的是早熟禾。播种后第15天,皇竹草幼苗最高,高达10.89cm,其次为波斯菊,高度达8.88cm,白三叶草植株最矮,仅为0.67cm。波斯菊植被覆盖度最高,达到了56.9%,皇竹草、波斯菊+紫花苜蓿+皇竹草混播、波斯菊+紫花苜蓿+白三叶草混播坡面的植被覆盖度分别为45.7%、36.1%、34.4%。人工模拟降雨时,播种皇竹草的坡面土壤侵蚀模数、径流系数分别为6.60t·km~(-2)、14.85%,土壤侵蚀程度较轻,水土保持效益最好;水土保持效益较好的有波斯菊+紫花苜蓿+白三叶草混播、波斯菊,土壤侵蚀模数分别为11.13、12.70t·km~(-2),径流系数分别为19.69%、21.34%。因此,将波斯菊、皇竹草、紫花苜蓿、白三叶草进行混合播种,具有良好的水土保持效益。
In this paper, two kinds of patterns of unicast and mixed sowing were used to sow the soil slopes of the new reclamation land in Xiayucun, Pingshan County, Hebei Province to study the growth characteristics and soil and water conservation benefits of several herbs in the gneiss in the Taihang Mountains. The results showed that: imperial bamboo germination the fastest, germination time is 3d, followed by cosmos, germination of the latest is bluegrass. On the 15th day after sowing, the seedlings of imperial bamboo were the highest, up to 10.89cm, followed by the cosmos with a height of 8.88cm. The white clover plants were the shortest with only 0.67cm. The coverage of cosmos was the highest, reaching 56.9%. The vegetation coverage of the mixture of imperial bamboo, cosmos + alfalfa + imperial bamboo grass, mixed cosmos + alfalfa + white clover was 45.7%, 36.1% 34.4%. When artificial rainfall was simulated, the soil erosion modulus and runoff coefficient of soil planted on imperial bamboo grass were 6.60t · km -2 and 14.85% respectively, the degree of soil erosion was light and the benefit of soil and water conservation was the best. The best combination of cosmos + alfalfa + white clover, cosmos and soil erosion modulus were 11.13 and 12.70 t · km ~ (-2), and the runoff coefficients were 19.69% and 21.34% respectively. Therefore, the cosmos, imperial bamboo grass, alfalfa, white clover mixed sowing, has good soil and water conservation benefits.