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black poplars
相关语句
  黑杨派
     Introduction and Selection of Southern Type Clone of Black Poplars
     黑杨派南方型无性系引种及选择的研究
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  “black poplars”译为未确定词的双语例句
     Narrow crown black poplars growth increment reach to comparison Ⅰ-69/55 and Zhonglin 46, crown diameter smaller than comparison for 1/2-1/3. Narrow crown black poplars has stronger salt-alkali-resistant, it is easy to propagate by rooting and have a high survive rate.
     前者生长量接近对照I -69/5 5和中林 46,冠幅比对照小 1/2~ 1/3 ,耐盐碱能力较强 ,容易扦插繁殖 ,造林成活率高。
短句来源
  相似匹配句对
     Black,M.
     Black,M.
短句来源
     Introduction and Selection of Southern Type Clone of Black Poplars
     黑杨派南方型无性系引种及选择的研究
短句来源
     Black, M.Scholes and R.
     Black,M.
短句来源
     L-1,it is toxic to two poplars.
     L-1时,则会产生伤害。
短句来源
     Study on breeding Technologies of poplars
     杨树无性繁殖技术研究
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  black poplars
A high proportion of Derbyshire's population of black poplars is located in the lower valley of the River Dove.
      


Six Italian clones, P. deltoides cv. I-63, I-69, eramerican hybrids I-72, I-214, I-45 and P. nigra cv. blanc garrone introduced into Jiangsu Province in 1972 recorded a rapid growth, with I 03, I-69 and I-72 being the most outstanding. But, according to our experience, different varieties require different growing conditions: P. deltoides I-63, I-69 and P. euramerican I-72 are best-adapted to warmer regions, while the euramerican hybrids I-214, I-45 and P. nigra blanc de garrone are more adapted to the temperate...

Six Italian clones, P. deltoides cv. I-63, I-69, eramerican hybrids I-72, I-214, I-45 and P. nigra cv. blanc garrone introduced into Jiangsu Province in 1972 recorded a rapid growth, with I 03, I-69 and I-72 being the most outstanding. But, according to our experience, different varieties require different growing conditions: P. deltoides I-63, I-69 and P. euramerican I-72 are best-adapted to warmer regions, while the euramerican hybrids I-214, I-45 and P. nigra blanc de garrone are more adapted to the temperate regions to the north of Changjiang River. As Aigeiros poplars require specific soil conditions for fastgrowing, proper site selection is necessary. Normal growth of black poplar is greatly influenced by four main soil conditions: soil physic: al conditions, moisture availability during growing season, nutrient availability and aeration, which are studied in detail in this paper.

1972年从意大利引入江苏省的黑杨派无性系Ⅰ—63、Ⅰ—69、Ⅰ—72、Ⅰ—45、Ⅰ—214和加龙生长迅速,特别是Ⅰ—63、Ⅰ—69和Ⅰ—72速生性状最为突出,这充分证明这些无性系适合于我省栽培。但由于这些无性系的地理起源不一致,引种到全国有关各地后,在生长上表现很不一致,为了发挥每一无性系的生产潜力,应根据适地适品种的原则,合理选择其适生的气候范围。杨树生长十分迅速,要求较好的立地条件,由于各地区影响立地条件的土壤因子各不相同,所以在选择杨树造林的立地条件时,应根据各地影响立地条件的主导因子来确定适宜栽培的程度。

Through many years continuous conservation and measuring,we have recognized the growth andlevelopment feature of lesser black poplar pulp plantation and the change principle of temperature and water inthe Lesser Black Poplar pulp plantation and the relations between the growth of lesser black poplar pulp plan-tation and economic factors.It is shown that the growth of lesser black pulp plantation surpass largely the in-lex in the high yield plantation standard and it can satisfy the need...

Through many years continuous conservation and measuring,we have recognized the growth andlevelopment feature of lesser black poplar pulp plantation and the change principle of temperature and water inthe Lesser Black Poplar pulp plantation and the relations between the growth of lesser black poplar pulp plan-tation and economic factors.It is shown that the growth of lesser black pulp plantation surpass largely the in-lex in the high yield plantation standard and it can satisfy the need of national standard that pulp plantation isolder than eight years old; water is the most important growth limitation factor of lesser black poplar pulpplantation,the limitation eftect of tempreture to lesser black poplar pulp plantation growth is small.For thecultivation of Lesser Black Poplar pulp plantation, we should increase the water quantity in the forest soil inrhe early period of growth season and take some essensial methods to improve the illumination in the pulpplantation, raise the soil temperature in the pulp plantation,and enrich pulp plantation growth.

通过连续多年的定位观测,弄清了小黑杨纸浆林生长发育的特点,得出了林分温度、水分的变化规律,并分析了生长发育与生态因子之间的关系;结果表明:小黑杨纸浆林的生长远远超过丰产林标准,8年以上就可满足国内制浆造纸要求;水分是小黑杨纸浆林生长的最主要限制因子,温度对小黑杨纸浆林生长的限制作用不大。小黑杨纸浆林的培育,在生长季早期应注意增加林地含水量,在整个培育过程中要采取松土、整枝等措施,改善林内光照,提高林地温度,以促进林分生长。

ast-growing clones of black poplar spread at

作者选用当前推广的和经1次生长初选的速生黑杨无性系为试验材料,以纸浆材品种选择为目的,进行了木材性状和生长性状的遗传分析,并运用综合选择指数从中筛选出生长、材性具佳的Carppaccio、925、I-69、80-I-6和鲁伊莎等5个优良无性系。可作为纸浆工业用材林品种进行区域推广。

 
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