科尔沁沙地植被生产力对模拟增加降水和氮沉降的响应

被引:17
作者
蒋德明 [1 ]
周全来 [1 ]
阿拉木萨 [1 ]
唐毅 [1 ,2 ]
押田敏雄 [3 ]
机构
[1] 中国科学院沈阳应用生态研究所
[2] 中国科学院研究生院
[3] 麻布大学
关键词
科尔沁沙地; 小叶锦鸡儿群落; 植被生物量;
D O I
10.13292/j.1000-4890.2011.0237
中图分类号
Q948 [植物生态学和植物地理学];
学科分类号
071012 ; 0713 ;
摘要
采用随机区组设计,利用降水收集装置和地表施氮处理,模拟降水和氮沉降增加对科尔沁沙地典型小叶锦鸡儿群落植被生产力的影响。结果表明:降水量增加1/7,植被平均高度增加不明显,植被生物量增加了17.6%;降水量增加2/7,植被平均高度增加了23%,植被生物量增加了31.8%;模拟氮沉降处理的一年处理结果对植被生物量增加不明显;降水是影响沙地植被生产力的关键因素,植被生产力对降水量增加响应迅速,短期的氮沉降对植被生产力的影响不显著。
引用
收藏
页码:1070 / 1074
页数:5
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