福建省寿宁县不同水土流失地类撒播马尾松、宽叶雀稗的成效调查

Effectiveness Investigation of Sowing Pinusmassoniana Lamb and Paspalumwettsteinii Hack in Different Types of Soil Erosion Land in Shouning County of Fujian Province

本文对5种水土流失地类撒播马尾松、宽叶雀稗4年间的生长情况进行调查和分析,结果表明:2013年撒播当年马尾松就取得初步成功,其优势种重要值为3.1%、盖度为1.0%;随后其优势种重要值和盖度均逐年增大,到了2016年已初见成效,其优势种重要值为36.5%、盖度为18.5%(其中削坡地盖度达28.6%)。2013年撒播当年宽叶雀稗取得较好成效,其优势种重要值为63.3%、盖度为40.1%;随后其优势种重要值和盖度均逐年减少,到了2016年宽叶雀稗优势种重要值仅为0.6%、盖度仅为0.6%。马尾松是水土流失地的先锋树种,适合不同水土流失地,以削坡地生长最好;宽叶雀稗可在当年快速覆盖地表,但逐渐被芒和芒萁所替代。

Investigation ＆analysis was conducted to the four - year growth situation of Pinusmassoniana Lamb and Paspalumwettsteinii Hack sowed in five types of soil erosion lands. The results show that, sowing of Pinusmassoniana Lamb in 2013 has achieved initial success within the year, with the important value of dominant species of 3.1% and the coverage of 1.0%. The dominant species value and coverage increased by years, in 2016, the dominant species value and coverage reached 36.5% and 18.5%, respectively. Of which, the coverage on the cutting slope reached 28.6%. Sowing of Paspalumwettsteinii Hack in 2013 has gained good achievement, with the dominant species value of 63.3% and the coverage of 40.1%. However, both the dominant value and coverage decreased by years. Until 2016, the dominant species value and coverage of Paspalumwettsteinii Hack only reached 0.6% and 0.6%, respectively. The Pinusmassoniana Lamb is the pioneer tree species suitable in the different soil erosion lands, especially in the cutting slope land. The Paspalumwettsteinii Hack may rapidly cover the ground within the year, but will be gradually replaced by the awns and dicranopteris pedata.