摘要
通过对福建平潭岛木麻黄防护林带生物量、生产力和生态经济效益进行 3a的定位研究 ,结果表明 ,木麻黄防护林带现存生物量为 3 5 0 2 5t·hm- 2 ,其净初级生产力为 2 3 91 8t·hm- 2 a- 1 。其有效防护范围为林带迎风面距林带 1 0H和林带背风面距林带 1 5H内。林带风速平均降低 2 4 3 % ,土壤细沙含量平均提高1 1 % ,蒸发量平均降低 1 5 7% ,土壤表层含水量提高 1 1 % ;降水量增加 46 1mm。林带防护范围内大麦产量提高 1 5 % ,大麦千粒重增加 7% ,粗淀粉含量提高 4 8%。表明木麻黄仍是目前我省沿海地区防护林的首选树种 ,具有较好的生态经济效益 ,对改善滨海地区生态环境、促进经济可持续发展有着重要意义。
The biomass, productivity and the ecological and economical benefits of \%Casuarina equisetifolia\% shelterbelt in coastal region of Pintan in Fujian Province were determined during 3 years. The biomass and net primary productivity of the shelter belt was 350 25 t·hm -2 and 23.918 t·hm -2 a -1 , respectively. The effective protected range of the shelterbelt was 10 \%H\%(ten\|fold of tree height) on windward side and 15 \%H\% on the leeside from the edge of the shelterbelt. In this range, the average wind speed was reduced by 24.3%, the average content of soil fine sand was increased by 1.1%, the average evaporation was reduced by 15.7%, the average precipitation was increased by an amount of 46.1 mm, and the soil moisture was increased by 1.1%. In the effective protected range, the crop yield was increased by 15%, with an increased dry weight per 1 000 kernel of barley and an enhanced coarse amylum content. The results indicated that \%Cauarina equisetifolia\% is the most effective in improving ecological environments of coastal region and contributes highly to the economic development.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2003年第1期31-35,共5页
Scientia Silvae Sinicae
基金
福建省科技厅资助项目 (K2 0 0 110 47)
福建省水土保持办公室资助项目
关键词
木麻黄
生物量
生产力
经济效益
生态效益
滨海防护林
Casuarina equisetifolia\%, Biomass, Productivity, Ecological and economical benefit
