In this paper, it mainly adopts an analytical method of contrast, with shelter belt and noshelter belt are research object, though field survey and soil fertility index analysis, discussJilin province Nong\'an Fulongquan town mechanism fertility degeneration of chernozem.

本文主要采用對(duì)比分析的方法，以防護(hù)林帶和非防護(hù)帶兩種不同生境影響下的土壤為研究對(duì)象日本最新黄色网站，通過(guò)田間調(diào)查和對(duì)土壤肥力指標(biāo)分析久久精品国产-精品国产，探討了吉林省農(nóng)安縣伏龍泉鎮(zhèn)境內(nèi)黑鈣土土壤的退化機(jī)理一级黄色电影视频影院。

This paper evaluates the water conservation effects of the young forests of the Shelter Belt Program of the Zhujiang Valley from three hydrologic levels of crown canopy, litter layer and soil layer, based on field investigations and measurements.

本文在對(duì)珠防工程監(jiān)測(cè)樣地調(diào)查自慰女生在线观看、測(cè)定的基礎(chǔ)上欧美三级在线在线播放，從林冠層、枯落物層和土壤層3個(gè)水文層次對(duì)珠防二期工程幼林的綜合持水能力進(jìn)行了評(píng)價(jià)。3 a-4 a生珠防林幼林的綜合持水量在2 355.25-2 457.08 t/hm^2之間另类图片激情小说网，比荒山高

The spatial pattern of ecological corridor is "a ring two belts four radials","one ring" refers to the rural Link (A30) green belt,"two belts " refers to the Hangzhouwan shelter belt and Chongming shelter belt,"four radials" refers to the benchmark for the rural Link to the outskirts in four directions radiation, putting all the country parks together to form a system.

生態(tài)廊道的空間格局為&一環(huán)兩帶四射&人人搞人人干人人操，&一環(huán)&是指郊環(huán)線(A30)綠化帶，&兩帶&是指杭州灣防護(hù)林帶和崇明防護(hù)林帶国产欧美另类在线专区，&四射&指以郊環(huán)線為基準(zhǔn)向郊區(qū)四個(gè)方向輻射黄网站一级视频免费看，將其他生態(tài)廊道及各郊野公園連在一起形成一個(gè)體系。

An important environmental project, a shelter belt along the middle and upper reaches of the Yangtze river, has been carried out in China

自1989年以來(lái)精品少妇无码AV在线播放，我國(guó)開(kāi)始實(shí)施一項(xiàng)重要的環(huán)境工程手机免费黄色网址，即在長(zhǎng)江中下游沿岸建立防護(hù)林帶

This shelter belts in the last century to create the 1960s, was the first successful creation of artificial coastal shelter belt, with a high reputation.

這條防護(hù)林帶，于上世紀(jì)六十年代營(yíng)造av激情综合，是我國(guó)第一條人工營(yíng)造成功的沿海防護(hù)林帶黄色三级被窝视频天堂网手机在线，具有極高的聲譽(yù)。

shelter belt：防護(hù)林帶

shelly 殼的 | shelter belt 防護(hù)林帶 | shelter oneself 掩護(hù)自己

shelter belt：防護(hù)林帶防風(fēng)林

sheeting structure 片狀結(jié)構(gòu) | shelter belt 防護(hù)林帶 ; 防風(fēng)林 | sheltered coast 隱蔽海岸

shelter belt：防風(fēng)林

shelter 隱蔽所 | shelter belt 防風(fēng)林 | shift 位移

shelter belt：<美>(保護(hù)農(nóng)作物的)防護(hù)林帶

projected tolerance zone 突出公差帶 | shelter belt <美>(保護(hù)農(nóng)作物的)防護(hù)林帶 | pinchcock clamp 彈簧(節(jié)流)夾, 節(jié)流夾

outer shelter belt：外緣防護(hù)林帶

綠色項(xiàng)鏈green necklace | 外緣防護(hù)林帶outer shelter belt | 城市綠化覆蓋率Afforestation coverage in the city