The study on self-thinning mechanism will provide referencefor density management and regulation of Cunninghamia lanceolata plantation.

杉木林自疏機制的研究可作為杉木人工林的密度管理和調控的依據(jù)亚洲a日韩国产。

In addition, the paper analyzed and simulated growth process of stand basal area, volume and biomass under different initial planting density for Cunninghamia lanceolate, plantation.

另外色播播电影，對杉木不同初植密度下林分斷面積激情小说图片亚洲、蓄積和生物量的生長過程進行了分析和模型擬合97超频国产在线公开免费视频。

CCF of control kept relatively stable, but that of thinning plots firstly decreased, then increased with ages and graduallyapproached to that of control. For Cunninghamia lanceolata plantation with different initial planting density, annual average growth rate of basal area and volume of low-density stands was more than that of high density.

對不同初植密度的人工杉木林分進行斷面積和蓄積的研究，發(fā)現(xiàn)不同初植密度對杉木林分的斷面積和蓄積的生長有一定的影響老师性色欧美A在线播放，初植密度大的林分斷面積和蓄積年平均生長率要小于初植密度小的林分亚洲综合乱伦，說明初植密度小的林分有向初植密度大的林分漸近的趨勢。

Based on the collected data of stand growth and environmental factors of 118 sample plots, according to the quantitative theory I , the authors set up the predicting model of self-thinning of Cunninghamia lanceolata plantation, using ten qualitative factors and four quantitative factors which have much influence on forest self-thinning of Cunninghamia lanceolata.

收集了 1 1 8塊杉木人工林樣地的林分生長和環(huán)境因子資料毛片播放网站在线免费，用環(huán)境因子中 1 0個定性和 4個定量因子對杉木人工林自然稀疏具有較大影響的因子狠狠操美女vs亚洲，應用數(shù)量化理論Ⅰ建立了杉木人工林自疏過程密度變化的預報模型。

Through applying advanced technique equipment and instrument, APP cultivates high-quality container cutlings to ensure planting health and vigorous cutlings (different species or clones Eucalyptus cutling) in raw material plantation base.

APP中國研發(fā)部和APP廣西林務的中心苗圃設在欽州色色亚洲色图一区，通過運用先進的技術、設備和手段欧美一二在线日本，培育優(yōu)質容器苗黄片啪啪啪啊啊啊，以保證原料林基地使用健康且長勢旺盛的苗木。

The plantation defoliated in dry seasons while the mountain rain forest was tall and dense evergreen broadleaved forest and kept green in dry season.The mountain rain forest\'s arbor layer contained 3 layers.Relatively open space under the canopy,rare shrub,sparse grasses,very tall wood vines and rich epiphytes were found in it.4 Afforestation did not change the life form spectrum significantly.

西南樺人工林的喬木層在旱季落葉性爱视频午夜，而山地雨林外貌為高大女人奶头视频不遮挡免费、常綠、茂密的闊葉林午夜一级黄色网站诱惑在线看国产，即使旱季也仍保持林冠蔥綠的外貌xxxx69，喬木層可明顯的分為3層，林下比較空曠欧美熟妇性视频，灌木植被少見国产在线精品二区，草本植物分散欧美老人黄色一级视频，另外具有高大的木質藤本植物和附生植物。4人工造林對群落的物種生活型譜影響不大亚洲一黄级。

Dilcey was head woman and midwife at Twelve Oaks, and, since the marriage six months ago, Pork had deviled his master night and day to buy Dilcey, so the two could live on the same plantation.

迪爾茜是&十二橡樹&村的女領班国产缴情久久久久影院老熟女，自從六個月前結婚以來，波克就沒日沒夜地纏著要主人把她買過來欧美大刁操大b，好讓他們兩口子住在一起影音先锋女人aV鲁色资源网久久。

Our country's deserts mainly lie in arid and semiarid areas, mostly with scarce precipitation and lack of water resource, neither natural vegetation with relatively strong drought-resistance capability nor plantation, like diversifolious poplar, dryland willow, shrubby sand willow, saxoul and Hedysarum mongolicum Turcz,etc., can be protected effectively, this leads to desertification area expansion and frequent sand storm, which seriously affect people's work and life.

我國沙漠多處于干旱和半干旱地區(qū)，絕大部分地區(qū)降水稀少欧美性爱日韩在线综合，水資源缺乏A片黄aaaAB，無論是具有較強抗旱能力的天然植被，還是人造林如胡楊激情图片欧美性爱、旱柳国产迷在线，灌木類沙柳、梭梭国产精品日韩在线观看最大、楊柴等都得不到有效保護中文字幕5页，導致沙化面積擴大，沙塵暴發(fā)生頻繁亚洲男女精品视频网站，給人民群眾的生產生活帶來嚴重影響免费人成网站在线观看不要钱。

In this research, we investigated the edaphon community structure from Gaofeng forest-farm Eucalyptus plantation in Guangxi Nanning by PCR-RFLP technique and 16S rDNA sequence analysis.

本研究利用限制性內切酶片段長度多態(tài)性和16SrDNA序列分析相結合的方法研究了廣西南寧高峰林場人工桉樹林中土壤微生物的群落結構。

The internationally scarce black-soil belt resource and sunshine belt of japonica rice plantation in sub-frigid zone of north latitude 45°, implemented the effortful "Ten Respective Projects": respective-breed reproducing, planting, managing, harvesting, transporting, storing, processing, packaging, laying, and selling.

北大荒米業(yè)依托國際稀缺的黑土帶資源和北緯45°亞寒帶粳稻種植的陽光地帶區(qū)位優(yōu)勢91精彩国产，強力實施&十專工程&：專品種繁育黄片在线www、專品種種植、專品種管理日韩免费一区二区三区免费视频道、專品種收獲96在线播放、專品種運輸、專品種收儲五月婷丁香综合网、專品種加工色欲黄色视频免费、專品種包裝、專品種存放日韩一级无码AV毛片免费、專品種銷售韩日精品高肏操穴视频免费。