In order to provide theoretical reference to the burl's directional cultivation and utilization research was done on Populus tomentosa,Salix matsudana and Robinia pseudoacacia,and the pH value, buffering capacity of acid and alkaline,curing time of UF of various species of the normal wood and the burl wood were compared.

為了給瘤材的定向培育和合理加工利用提供科學(xué)依據(jù)，以自然生長(zhǎng)的二级A片在线观看、帶有樹(shù)瘤的毛白楊、旱柳、洋槐為試驗(yàn)材料国产在线com，對(duì)各樹(shù)種的正常材和瘤材的pH值、酸堿緩沖容量1024日韩欧美手机在线你懂的、與脲醛樹(shù)脂膠固化時(shí)間等指標(biāo)草逼福利视频，進(jìn)行對(duì)比研究。

The sixteen plants are firstly divided into six types according to evaluation grades and subject function statistical method:the first type is Cajanus cajan and Crotalaria mucronata,the best adaptability ,which can be used pioneer plant or constructive species; the second type is Cynodon dactylon,the better adaptability, which can be used constructive species ;the third type is Eragrostis curvula, Paspalam notatum,which can be used constructive species on rotten rock slope ; the forth type is kummerowia striata,Lotus corniculatus and Vitex negundo.The adaptability is centered,and can be used protection species and auxiliary species;the fifth type is Robinia pseudoacacia,Eremochloa ophiuroides,Vitex negundo,Lespedeza formosa,Leucaena leucocephala,Desmodium sequax, Rhus chinne- nsis,which can't be plant singly and be used accessory species;the sixth is Trifolium repens,which can be used pioneer plant.

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As the major tree species for forestration in Hilly region on the Loess Plateau, Robinia pseudoacacia and Hippophae rhamnoides can only grow normally in habitant with better soil water condition due to the limited drought resistance of H.

作為黃土高原的主要造林樹(shù)種，沙棘的抗旱性最差操人人看人人摸人人插，而刺槐的耐旱性最差无遮挡一级毛片视频免费的，它們都要在土壤水分條件較好的生境才能正常生長(zhǎng)。

Through the experiment with Pinus tabulaeformis, Robinia pseudoacacia and Lespedeza bicolor, the regression equation with varies of separation voltage and roller rotate speed is proposed and the most optimized electrical separation parameter arrangement is affirmed.

通過(guò)對(duì)油松黄片毛片你人黄片毛片、刺槐和胡枝子 3種林木種子的試驗(yàn)黄色免费在线网观看，得到了以分選電壓和分選滾筒轉(zhuǎn)速為變量的回歸方程，井確定了最優(yōu)化的電場(chǎng)分選參數(shù)組合黄片在线免费看啊啊啊。

(1)The Miscellaneous shrub (Thick and thin Miscellaneous shrub) landscape type is the largest area-part of Yangou watershed,farmland,robinia pseudacacia,mature orchard and grass are second to it.

中文摘要：統(tǒng)計(jì)分析燕溝流域不同生態(tài)功能景觀的斑塊構(gòu)成中文字幕欧美亚洲，為流域治理效果評(píng)價(jià)和景觀格局優(yōu)化提供依據(jù)。

At present, new varieties of seeds and seedlings have: Japan Jinguan Parkinson, Parkinson Wheatgrass, Blue Sword hodginsii, Eclisse Magnolia, fire-Yan Photinia, Mosaic climb vulgaris, Viburnum, Phnom Penh cornuta, Golden Robinia, Purple Bauhinia leaves Canada, liquor Silver Parker, silver edge Pittosporum, yellow fruit Pyracantha, Acer rubrum.

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Conclusion］This research will provide the theoretical references for growth and drought tolerance of robinia.

結(jié)論］ 該研究為飼料型刺槐的栽培和耐旱性研究提供理論依據(jù)黄色AA网站。

The population structure and dynamics of Robinia pseudoacacia clones are studied.

研究了刺槐克隆種群的種群結(jié)構(gòu)和生長(zhǎng)動(dòng)態(tài)影音先锋你懂。

Method］ The main physiological characteristics of the 3 clone robinia seedlings for forage were studied.

方法］對(duì)3個(gè)飼料型刺槐無(wú)性系的主要光合生理指標(biāo)進(jìn)行對(duì)比分析。

Objective］ The purpose was to study the photosynthetic-physiological characteristics among the robinia seedlings.

［目的］研究刺槐幼苗的光合生理特征再线观看黄色网站。