Researchers are experimenting with field covers of such nitrogen-rich plants as Berseem clover, said Jim Brandle, a university professor in shelterbelt ecology.

農(nóng)藝學(xué)和園藝學(xué)推廣專家查克弗朗西斯說(shuō)欧美一级片在线，許多大量使用化學(xué)農(nóng)藥的大規(guī)模農(nóng)場(chǎng)都將耕田機(jī)擱置在一邊干中文字幕。

Tall California cypress endemic on Monterey Bay; widely used for ornament as well as reforestation and shelterbelt planting.

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This article analyzes the significance and the method of the evaluation of the forest carbon-sink,taking the artificial planta- tion of the Three-north shelterbelt forest system program as an example,uses the variable BEF (Biomass Expan- sion Factor) method to assess the value at the Three-north shelterbelt forest carbo.

對(duì)森林碳匯價(jià)值評(píng)價(jià)意義和方法進(jìn)行了分析，并以三北防護(hù)林體系工程人工林為例美女被干黄色网站，采用換算因子連續(xù)函數(shù)法對(duì)三北防護(hù)林的碳匯價(jià)值量進(jìn)行了評(píng)價(jià)国产人人搞人人舔，提出了持續(xù)開(kāi)展三北工程、提高人工林固碳能力的對(duì)策建議www.wuma04.com。

sheltered：遮蔽的

shelterbelt /防護(hù)林帶/ | sheltered /遮蔽的/ | shelterless /無(wú)處藏身的/

sheltered industries：保護(hù)性工業(yè)

shelterbelt 防風(fēng)林 | sheltered industries 保護(hù)性工業(yè) | shelve 擱置

shelterbelt;windbreak：防風(fēng)林帶;保護(hù)林帶

保存林;預(yù)備林 forest reserve;reserved forest | 防風(fēng)林帶;保護(hù)林帶 shelterbelt;windbreak | 經(jīng)濟(jì)林;生產(chǎn)林 commercial forest;production forest