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regional test    
相关语句
  区域试验
    Anmylsis on Effect and Stability of the Regional Test of Populus × euramericana Clones
    欧美杨无性系区域试验的效应分析与稳定性测定
短句来源
    The Comment and Investigation on Regional Test of Poplar Fine Varieties
    杨树良种区域试验品评调查
短句来源
  区域试验
    Anmylsis on Effect and Stability of the Regional Test of Populus × euramericana Clones
    欧美杨无性系区域试验的效应分析与稳定性测定
短句来源
    The Comment and Investigation on Regional Test of Poplar Fine Varieties
    杨树良种区域试验品评调查
短句来源
  区域试验
    Anmylsis on Effect and Stability of the Regional Test of Populus × euramericana Clones
    欧美杨无性系区域试验的效应分析与稳定性测定
短句来源
    The Comment and Investigation on Regional Test of Poplar Fine Varieties
    杨树良种区域试验品评调查
短句来源
  区域性试验
    A lot of excellent fast growing families were selected by selecting puls-trees, establishing seed orchards, progeny test etc. The regional test plantation was established with the selected excellent families. The analytical results of 5-year old plantation were showed as follows: (1) 41 excellent families were selected, and the average volume genetic gain was 23.9%, the selection rate was 39.4%.
    以全国10个省(区)14个杉木初级种子园的112个优良家系为试材,在浙江两个点进行区域性试验,5年的调查资料分析结果如下:①选出了41个优良家系,其选择率为39.4%,平均材积遗传增益达23.9%。
短句来源
    Regional test on 35 prelimiary selected excellent families in 1983 showed that after 4 years observation, 8 families were better than others which had evident high yield; 17 dominant trees selected,there yield of the 4th year was 138.2% of the primary improved families,besides, 37.7% could be increased during mature period; it was reasonable to select excellent family at the 4-year.
    1959年,将初选出的35个优良家系作进一步的区域性试验,经过4a观测研究后认为.①61号等8个家系,表现突出,在我市推广,增产明显,②选出的17株优树,同初级良种相比,第4年增产138.2%,成熟期可望增产37.7%,③杉木4a生时,进行选择是较为可靠的.
短句来源

 

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  regional test
A regional test of the ricardian theory of comparative advantage
      
Factor prices, factor proportions, and factor endowments in the pacific northwest: a regional test of the Heckscher-Ohlin theore
      
crassa cytoplasm proved the best in production test, demonstration and regional test axtd was consequently pre-approved for large-scale plantation.
      


Poplar 741 is a clone of hybrid from 4 different species: Populus alba ×(P. davidiana+P. simonii)×P). tomentosa. The regional tests and character analysis for 741 show that it possesses the following advantages: fast growing, high quality, straight and round trunk. its average volume of 4-9 year-odd trees is 240% higher than that of P. tomentosa and 12—169% higher than that of P. tomentosa f. yixianensis. Its wood basic density, compressive strength parallel to the grain, bending strength and hardness...

Poplar 741 is a clone of hybrid from 4 different species: Populus alba ×(P. davidiana+P. simonii)×P). tomentosa. The regional tests and character analysis for 741 show that it possesses the following advantages: fast growing, high quality, straight and round trunk. its average volume of 4-9 year-odd trees is 240% higher than that of P. tomentosa and 12—169% higher than that of P. tomentosa f. yixianensis. Its wood basic density, compressive strength parallel to the grain, bending strength and hardness are much better than those of P. tomentosa f. fixianensis. Its adaptability is also studied in this paper.

741杨是以银白杨×(山杨+小叶杨)杂种为母本,以毛白杨为父本有性杂交选育的单株无性系。经过区域试验和性状测定,表明741杨具有速生、优质的特点。4—9年平均单株材积超过普通毛白杨240%,超过易县毛白杨12—169%;树干通直、圆满,木材基本密度、顺纹抗压强度、抗弯曲强度、硬度等均显著优于易县毛白杨。还对741杨的适生特性进行了分析。

Chinese Fir is a fast growing wood species in China. A lot of excellent fast growing families were selected by selecting puls-trees, establishing seed orchards, progeny test etc. The regional test plantation was established with the selected excellent families. The analytical results of 5-year old plantation were showed as follows: (1) 41 excellent families were selected, and the average volume genetic gain was 23.9%, the selection rate was 39.4%. (2) The differences among sites, seed orchards and seed...

Chinese Fir is a fast growing wood species in China. A lot of excellent fast growing families were selected by selecting puls-trees, establishing seed orchards, progeny test etc. The regional test plantation was established with the selected excellent families. The analytical results of 5-year old plantation were showed as follows: (1) 41 excellent families were selected, and the average volume genetic gain was 23.9%, the selection rate was 39.4%. (2) The differences among sites, seed orchards and seed orchard x sites were all significant. The results showed that family selection would be efficient and the environment significantly affected the growth of Chinese Fir. (3) The benefit of establishing seed orchards was obvious. The average genetic gain of the 14 seed orchards tested was 18.6%. The gain from the central region was higher than that from the general region. The results was similar to that of provenance test.

以全国10个省(区)14个杉木初级种子园的112个优良家系为试材,在浙江两个点进行区域性试验,5年的调查资料分析结果如下:①选出了41个优良家系,其选择率为39.4%,平均材积遗传增益达23.9%。②地点、种子园的效应及种子园×地点的互作效应都极显著,说明选择是可行的,但环境对杉木生长起很大的作用。③营建种子园增产效益明显,参试的14个种子园平均材积遗传增益达18.6%,并且,来自中心产区种子园大于一般产区。

40 elite clones were tested by grafting on mature trees in regional experiment. 19 new prolific varieties of Camellia oleifera, such as Yalin No. 4 (Ju No. 24) were selected based on data of oil production and fruit quality in four consecutive years. The mean seed oil (450kg per ha) obtained from new varieties was increased by 15% than the mean value from all tested clones, and was 3-5 times over the oil production in normal tea-oil tree stand available. Those varieties were the first batch of new prolific ones...

40 elite clones were tested by grafting on mature trees in regional experiment. 19 new prolific varieties of Camellia oleifera, such as Yalin No. 4 (Ju No. 24) were selected based on data of oil production and fruit quality in four consecutive years. The mean seed oil (450kg per ha) obtained from new varieties was increased by 15% than the mean value from all tested clones, and was 3-5 times over the oil production in normal tea-oil tree stand available. Those varieties were the first batch of new prolific ones bred by three-round selection and regional test, also possessed great scientific merit and importance. This research solves the problems of matching elite clones in a stand. At present, large-area nurseries of scion-plucking and demonstration stands established with above elite clones played positive role in the establishment of new stand and improvement of poor old stands, and achieved significant economic and social benefits.

采用大树嫁接方法,选择40个优良无性系进行全国区域性测定;经连续四年测产及果实品质测定,选育出赣_1(区4)、亚林_4(区24)等19个高产新品种。选出的新品种平均每公顷产油450 kg以上,比参试无性系均值高15%以上;比现有茶林产油高3~5倍以上。这是我国第一批经三轮选择、测定而选育出的高产新品种。同时,研究和解决了优良无性系造林搭配及可配性大小等问题。现已营造的大面积采穗圃及示范林,在造林和低产林改造中获得了显著的经济、社会效益。

 
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