摘要
从野外测定和理论估算两个方面，分析了苏北沿海地区杨树和水杉农田林网的胁地范围。结果表明：这两种模式农田林网存在着不同程度的胁地作用，且网格组成林带的胁地范围有着明显的差异，南林带最严重，水杉林网为１．０Ｈ；杨树林网为１．５Ｈ；东、西林带其次，水杉林网为０．５～０．８Ｈ；杨树林网为１．０Ｈ；北林带胁地范围不明显。在胁地范围内，水杉林网的小麦减产率约为杨树林网的一半（北林带除外）。
he marginal
limits of metasequoia and poplar farmland forest shelter netwo-rks are studied by
field-determination and theoretical calculation in the coast of Jiangsu。The results show that
the marginal effect are different of two model farmland forest shelter networks,and the marginal
limits of every shelter belt being apparent difference:South shelter belt is most serious,it's 1
0H and 1.5H far from shelter belt respectively in metasequoia and poplar shelter network; East
or west shelter belt is secondly,it’s 50.5～0.8H and 1,0H far from shelter belt res-pectively in
metasequoia and poplar shelter network,North shelter belt is unapa-rent,The rate of wheat
reduction in yield of metasequoia shelter network is half of poplar shelter network within the
marginal limits(excluding north shelter belt)。
出处
《江苏林业科技》
1994年第2期5-9,15,共6页
Journal of Jiangsu Forestry Science & Technology
关键词
苏北沿海
农田林网
胁地效应
Coast of Jiangsu
Farmland forest
shelter network
Model
Poplar
Metasequoia
Marginal effect
