20 May 1998, Volume 1 Issue 3

    

• Select all
  |

研究论文
• Select
  Effect of Temperature on Photosynthetic Characteristics of Ginger Leaf

  Ai Xizhen;Zhang Zhen xian;Wang Shaohui et al.

  . 1998, 1(3): 1-0.

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  The result showed that ginger leaves indicated the highest photosynthetic rate and apparent quantum efficiency under 25℃ in product forming stage. The photosynthetic rate of ginger leaves increased with the increasing of PFD and CO 2 concentration in certain range. Light compensation point of photosynthesis was in the range of 25～69μmol·m -2 ·s -1 ,it increased with the increasing of temperature. Photosynthesis was saturated in light intensity of 642～867μmol·m -2 ·s -1 ,which depended on le...

• Select
  Study on the Freezing Tolerance of Red Tsai tai

  Liu Lecheng;Yan Rulai

  . 1998, 1(3): 2-0.

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  There were 19 genotypes of Red tsai tai ( B. Campestris ssp. Chinensis var. Purpurea Hort. ) to be used in this experiment. Excised leaflet tissues were treated with various low temperatures. After measuring the percentage of electrolyte leakage,cell membrane injury percentage (MIP) was calculated. Then using the relationship of MIPs and temperatures to coincide Logistic equation,the inflexion point temperatures (IPT) were made out and were used to estimate the lethal low temperatures (LLT). The...
• Select
  Application of Chemical Formulations and Film Bags in Storage of Strawberry

  Mao Linchun;Ying Tiejin;Hu Kecheng et al.

  . 1998, 1(3): 3-0.

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  Effects of eight chemical formulations and five types of films on postharvest ripening and rot of strawberry were assessed. Fruits were dipped in 2.0% CaCl 2 solution containing 100mg/kg gi bberellin and 0.2% citric acid then stored at 2℃ for 15 days. The chemical formulation increased fruit firmness and kept fruit and leaf color. Type I film bag was highly effective in maintaining firmness,soluble solids,fresh weight,and preventing gray mold rot. Soluble solids decreased and Vitamine C lossed by 41%～...
• Select
  Predicting Models of Strawberry Damage by Impaction

  Chen Cuiren;Qian Dongmei;Cui Shaorong et al.

  . 1998, 1(3): 4-0.

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  The regularity of the strawberry damage by impaction was studied. The mathematical model of strawberry damage was established,which could be used to predict the practical damage of strawberries at the same conditions. The allowable drop height of strawberry on different impact surfaces was determined.
• Select
  Design and Application of the Automatic Topdressing System for Network Irrigation in Solar Greenhouse

  Li Yanying

  . 1998, 1(3): 5-0.

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  An automatic topdressing system was designed on the base of the principle of hydrokine tics using energy of static pressure for pipe irrigation and the feature of Venturi Pipe in solar greenhouse. This system is simple,practical efficient and suitable for vegetable production in solar greenhouse.
• Select
  Effects of Culture Density on the Yield of Shoots and its Growth in Asparagus

  Zeng Tianyin;Zhang Xiuyi

  . 1998, 1(3): 6-0.

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  Three densities of Asparagus:①35cm×100cm,②35cm×150cm and ③35cm×200cm were tested for yield and growth. The results of five years indicated that the mean annual yield of young stem for density of 35cm×100cm was 23.1% and 55.6% higher than those of 35cm×150cm and 35cm×200cm treatments,respectively. During five year tests,yield of shoots increased each year. Shoot number above ground,plant height and index of growth decreased with increment of densities.
• Select
  The Test of Grafting Bitter Gourd on Luffa

  Chen Xiangbo;Zhong Wuhui;Li Hailong et al.

  . 1998, 1(3): 7-0.

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  Grafting-bitter gourd on Luffa rootstock showed a good compatibility,81.5% seedling survived. The grafted plants grew vigorously at late stage,gave high quality of fruits and increased resistance to nematode. The yield of grafted plants concentrated on later stage was 38.4% higher than that of non-grafted bitter gourd.
试验研究
• Select
  Preliminary Report on Tests for Preventing and Controling Spodoptera exigua with Some New-type Insecticides

  Xu Fangcheng;Chen Zailiao;Wu Yonghan et al.

  . 1998, 1(3): 9-0.

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  our new-type insecticides,Polo,Chlorfenapyr,Xentari and Mimic were selected from ten screened insecticides through their indoor toxicity evaluations and field effectiveness tests. These insecticides are efficacious in preventing and controling Spodoptera exigua. Among them,Polo and Chlorfenapyr have low toxicity,high efficient,long residual effect. They can be used as best insecticides in the years of Spodoptera exigua breakout. Xentari and Mimic have higher and slower preventing effect. They can b...
品种选育
• Select
  Breeding for Cantaloup Cultivar ‘Xinmi No. 13’

  Li Yuling

  . 1998, 1(3): 10-0.

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  Xinmi No 13’ is a cantaloup F 1 hybrid. Its parental lines were selected from a local variety ‘Hongxincui’ and a variety introduced from Europe. The fruit skin of ‘Xinmi No. 13’ is golden with fine and dense net. The fruit shape is elliptical. Flesh is orange,sweet and crisp,and have good quality. The single fruit weight is over 3kg. The soluble solid is over 14%. The durability of storage and transport is high. It can be harvested 3～5 days earlier than that of ‘Huanghou’ (the Popular Cultivar). The averag...
• Select
  Breeding of a New Early Maturing Cucumber Cultivar ‘Huahuanggua No. 1’ Suitable for Spring and Autumn

  Xu Yuejin;Yan Rulai

  . 1998, 1(3): 11-0.

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  Huahuanggua No. 1’ is a F 1 hybrid developed with inbred 8624 crossing with inbred 8601. It can be grown in Spring and Autumn. The yield of the hybrid was 67500 kg/ha. The high yield could be about 90000 kg/ha. It has high resistance to downy midew and powdery mildew. It has been excended about 8000 ha in 18 provinces.