浙江林学院学报
浙江林學院學報
절강림학원학보
JOURNAL OF ZHEJIANG FORESTRY COLLEGE
2010年
2期
198-204
,共7页
沈青叶%李晴%邹春静%张超
瀋青葉%李晴%鄒春靜%張超
침청협%리청%추춘정%장초
农田防护林%林带疏透度%水稻产量%千粒质量%叶面积指数
農田防護林%林帶疏透度%水稻產量%韆粒質量%葉麵積指數
농전방호림%림대소투도%수도산량%천립질량%협면적지수
farmland shelter-belt%sheher forest porosity%yield%1 000-grain weight%leaf area index
选取农田防护林主要模式,调查其结构特征,探讨防护林对所防护的水稻Oryza sativa产量和千粒质量的影响.经统计分析,结合林带疏透度及水稻防护效益,得到每种模式最佳防护区域,找出最佳防护模式,从而优化崇明岛农田防护林模式.结果表明:5种模式农田防护林都能使水稻增产,提高水稻千粒质量,并有利于叶面积指数的增加;同一样地不同树高倍数处产量及千粒质量差异显著,空间数值变化趋势相同;不同模式增产效益有较大区别,5种模式增产效益为:池杉Taxodium ascendens 模式>水杉 Metasequoia glyptostrobotdes-柳杉 Cryptomeria fortunei混交模式>水杉模式>杨树Popular spp.模式>柳杉模式;5种模式防护林林带平均疏透度变化范围为0.31~0.39.高于最适值范围,树干疏透度偏大;最佳防护区域均为林带树高的5~10倍(5H~10H),混交林比纯林具有更好的防护效益:水杉-柳杉混交模式为最佳防护模式,池杉模式、水杉模式次之,杨树模式和柳杉模式居后.
選取農田防護林主要模式,調查其結構特徵,探討防護林對所防護的水稻Oryza sativa產量和韆粒質量的影響.經統計分析,結閤林帶疏透度及水稻防護效益,得到每種模式最佳防護區域,找齣最佳防護模式,從而優化崇明島農田防護林模式.結果錶明:5種模式農田防護林都能使水稻增產,提高水稻韆粒質量,併有利于葉麵積指數的增加;同一樣地不同樹高倍數處產量及韆粒質量差異顯著,空間數值變化趨勢相同;不同模式增產效益有較大區彆,5種模式增產效益為:池杉Taxodium ascendens 模式>水杉 Metasequoia glyptostrobotdes-柳杉 Cryptomeria fortunei混交模式>水杉模式>楊樹Popular spp.模式>柳杉模式;5種模式防護林林帶平均疏透度變化範圍為0.31~0.39.高于最適值範圍,樹榦疏透度偏大;最佳防護區域均為林帶樹高的5~10倍(5H~10H),混交林比純林具有更好的防護效益:水杉-柳杉混交模式為最佳防護模式,池杉模式、水杉模式次之,楊樹模式和柳杉模式居後.
선취농전방호림주요모식,조사기결구특정,탐토방호림대소방호적수도Oryza sativa산량화천립질량적영향.경통계분석,결합림대소투도급수도방호효익,득도매충모식최가방호구역,조출최가방호모식,종이우화숭명도농전방호림모식.결과표명:5충모식농전방호림도능사수도증산,제고수도천립질량,병유리우협면적지수적증가;동일양지불동수고배수처산량급천립질량차이현저,공간수치변화추세상동;불동모식증산효익유교대구별,5충모식증산효익위:지삼Taxodium ascendens 모식>수삼 Metasequoia glyptostrobotdes-류삼 Cryptomeria fortunei혼교모식>수삼모식>양수Popular spp.모식>류삼모식;5충모식방호림림대평균소투도변화범위위0.31~0.39.고우최괄치범위,수간소투도편대;최가방호구역균위림대수고적5~10배(5H~10H),혼교림비순림구유경호적방호효익:수삼-류삼혼교모식위최가방호모식,지삼모식、수삼모식차지,양수모식화류삼모식거후.
Farmland shelter-belts are the main component of Chongming Island's shelter forest network.The objective of this study was to select the optimum farmland shelterbelt type by determining the optimal shelter forest porosity.After choosing the main shelter forest models(Taxodium ascendens forest,mixed Metasequoia glyptostroboides(water fir)-Cryptomeria fortunei forest,M.glyptostroboides forest,Populus spp.(poplar)forest,and C.fortunei forest)and surveying the community structure,rice yield and 1 000-grain weight were determined for each shelter forest.Results showed that at different distances within the same sample plot,forest protection significantly improved rice yield and 1 000-grain weight;leaf area index also improved.Among the different models,yield increase was in the oater T.ascendens>the mixed forest of M.gtyptostroboides and C.fortunei>M.glyptostroboides>Populus spp.>C.fortunei.The range of shelter forest porosity was 0.31-0.39,and the most effective protective distance was 5H(fivefold height of the tree)10H.In addition.the mixed forest was better than the monotypic forest with the mixed forest of M.glyptostroboides and C.fortunei being the optimal shelterbelt model.