CAJ | 학술논문

对吉林省农安地区成熟防护林的农田林网的防风敢应、水热效应和经济效益进行了调查研究。结果表明：由4条林带构成的林网．平均降低风速30．4％，最低风速出现在观测区背风面的3H-10H处。降低60％。林网内背风面1H—10H处和迎风面3～5H处为增温区．日平均增温0．4～1．0℃。而林网内背风面15H～35H处和迎风面6H处为低温区，日平均增温在0.3～0．5℃。2行林带在有效防风距离以内．相对湿度的提高最低，平均提高6-3个百分点。12行林带次之，平均提高10．1个百分点。6行林带最好，平均提高20．4个百分点。林网内玉米平均产量9211．9kg／hm2．比对照区增加14．1％。3～10H增产幅度为17％～25％，属于增产率最高区。可见，农田防护林具有非常明显的防风效应、水热效应和经济效益．是农田基本建设的重要组成部分。
대길림성농안지구성숙방호림적농전림망적방풍감응、수열효응화경제효익진행료조사연구。결과표명：유4조림대구성적림망．평균강저풍속30．4％，최저풍속출현재관측구배풍면적3H-10H처。강저60％。림망내배풍면1H—10H처화영풍면3～5H처위증온구．일평균증온0．4～1．0℃。이림망내배풍면15H～35H처화영풍면6H처위저온구，일평균증온재0.3～0．5℃。2행림대재유효방풍거리이내．상대습도적제고최저，평균제고6-3개백분점。12행림대차지，평균제고10．1개백분점。6행림대최호，평균제고20．4개백분점。림망내옥미평균산량9211．9kg／hm2．비대조구증가14．1％。3～10H증산폭도위17％～25％，속우증산솔최고구。가견，농전방호림구유비상명현적방풍효응、수열효응화경제효익．시농전기본건설적중요조성부분。
In this paper,the windproof effects,hydro-thermal effects and economic benefits of matured shelter-forest in Jilin Nong＇an District were investigated. The results showed that the forest-network formed by the four forest-belts,reducing 30.4% of the wind speed on average,and minimum wind speed appeared in the range of 3 H to 10 H （height of shelter belt）on the leeward side in observation area with reduction of 60%. The heating zones appeared in the range of 1 H to 10 H on the leeward side and 3 H to 5 H on the windward side. The daily average temperature increased by 0.4 ℃ to 1.0 ℃. However,the low temperature area appeared in the range of 15 H to 35 H on the leeward side and 6 H on the windward side. The daily average temperature was increased by 0.3 ℃ to 0.5 ℃. 2-line forest-belt within an effective distance of the windbreak ,the improvement of the relative humidity was the lowest,which had an average increase of 6.3 percentage points. 12-line forest-belt was next, which had an average increase of 10.1 percentage points. 6-line forest-beh was the best ,which had an average increase of 20.4 percentage points. Corn in forest-network yielded 9 211.9 kg/hm2 on average ,which had an increase of 14.1% compared with the contrast area.In the range of 3 H to 10 H site it＇s yielded 17% to 25%, which was the highest increasing area. It showed that farmland shelter-forest had very significant windproof effects, hydro-thermal effects and economic benefits, which was an important part of farmland capital construction.