20 January 1997, Volume 1 Issue 1

    

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研究论文
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  Effects of Temperature and Photoperiod on Sex Expression of Momordica Charantia

  Wang Qiaomei;Zeng Guangwen;Jiang Youtiao

  . 1997, 1(1): 1-0.

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  The environmental conditions under which Momordica charantia seedling grew affected its sex expression. Both varieties“Zhuzhou Changbai”and“Yingyin”were short-day plants,the short day length resulted in earlier plant development and more female flowers. The short-day treatment period of Momordica charantia seedlings should be from the day when the seedlings were first emerged to the day when the sixth leaf appeared(at age of 20 days). Low temperature enhanced the short-day effect,while high temperature dela...
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  Study on Screening Method for Resistance to Anthracnose of Chinese Cabbage in Seedling Stage

  Liu Aiyuan

  . 1997, 1(1): 2-0.

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  A rapid method of identifing resistance to anthracnose of Chinese cabbage in seedling stage and reflecting adult resistance was developed by testing different inoculating methods,temperatures,plant ages and inoculum concentrations. The suspension of 6 000～12 000 conidia/mL was dripped on to the cotyledon of Chinese cabbage seedlings at cotyledon stage and kept at the temperature of 20～32℃ in 100% moisture for 24～48 hours.
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  Occurance and Control of Scallion Anthracnose

  Shi Zhilong;Tong Xianming

  . 1997, 1(1): 3-0.

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  The scallion anthracnose started occurring from the end of April to the begining of May in Zhoushan Island,Zhejiang,China. It reached maximum at the middle or the last ten days of May. A moderate temperature and heigh humidity were the important factor for the disease epidemic. Irrigated or continuous cropping field was in favor of the disease occurance. The yield loss caused by the disease was 20%～50% in irrigated field,and 10%～25% in nonirrigated farmland. The disease could be controlled by application of...
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  The Effecd of Temperature on Germination and Metabolism of Asparagus Seeds

  Ren Anxiang;Zhou Qian;Wang Yumei et al.

  . 1997, 1(1): 4-0.

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  The optimum germination temperatue of Asparagus seeds ranged from 20℃ to 25℃. The germination percentage of seeds,enzyme activity of α-amylase and respiratory intensity were positively related in a certain temperature range. The storage matters,such as starch,protein and fat etc. decreased while seeds germinated. The seed treatment of alternate temperature was better than the constant treatment. Temperature of day 25℃/night 20℃ gives the best result.
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  Effect of Fertilizers on Growth and Yield of Ginger

  Ai Xizhen;Zhao Dewan;Qu Jingran et al.

  . 1997, 1(1): 5-0.

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  Effects of different combinations of N,P,K fertilizers on growth and yield of ginger were tested. The result indicated that the middle-level treatments,N 40kg,P 2O 5_7.5kg,K 2O 40kg per 667m 2,was the best,giving higher shoots,more and stronger branches,larger leaf area,more accumulation of dry matters and higher yield.
品种选育
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  Breeding of Chinese Cabbage F 1 Hybrid‘Zhongbai No.2’

  Wang Jingyi;Yang Liwei;Chen Jie

  . 1997, 1(1): 7-0.

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  F 1 hybrid Zhongbai No. 2 has been bred using the two self-incompatible lines. Its growth period is 85 days and dwarf-stalk and overlapping in shape. It has highly resistant to Turnip Mosaic Virus,downy midew and black rot and has good quality,good storage property,which has been extended in Hebei,Shandong,shanxi,Henan and Qinghai.
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  Selection of New Cucumber Variety‘Jinong No. 2’

  Luan Yushi;Zhang Hanqing;Li Changlan et al.

  . 1997, 1(1): 8-0.

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  New Cucumber Variety‘Jinong No. 2’is the result of repeated selection from cross combination of Ningyangdaci and Xiaobacha. The first nodal position of female flower is 3～6. The color of fruits is dark-green. The length of fruits is about 30～40cm. The type of fruits is claviform. The average fruit weights 250g. The yield is about 6t/ha. The variety is suitable to plant in most regions of Jilin province for open culture in both spring and summer.