18 July 2008, Volume 1 Issue 7

    

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试验研究
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  Effect of Base and Top Dressing Fertilizer Doses on the Growth and Yield of Chinese Chive

  Yu Hongjun;Jiang Weijie;Shi Zhenxia;et al.

  . 2008, 1(7): 10-13.

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  In this paper，the effect of different doses of base fertilizer and top dressing fertilizer on the growth and yield of Chinese chive of Eco-organic type soilless culture（EOTSC）was studied.The results showed that the treatment of 16 kg·m^-3 base fertilizer can have the highest total yield and total production value，while 8 kg·m^-3 of base fertilizer dose can get the highest net income，and there were no remarkable differences between pseudostem width and leave width with the treatments of 12 and 16 kg·m^-3 base fertilizer.In the experiment，treatment with 7 kg·m^-3 of top dressing fertilizer can get the highest total yield and total production value，but the treatment of 4 kg·m^-3 can get the highest net income，and there were no significant differences in pseudostem width with the treatments of 7 and 10 kg·m^-3.The leave width was even better than that in the above 2 treatments.Therefore，in EOTSC the best base fertilizer dose is 8 kg·m^-3 and the best top dressing fertilizer dose is 4 kg·m^-3 per time.
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  Effect of BTH Treatment on Latent Infection Rate of Certain Fungus in Muskmelon

  Li Mei;Bi Yang;Xie Minhua

  . 2008, 1(7): 14-17.

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  The plants of muskmelon were sprayed with benzothiazole（BTH）at 100 mg·L^-1 for 1，2，3 and 4 times at 7 days before flowering，young fruit period，fruit enlarging period and netting period，respectively.Latent infection rate of fungus were analyzed in young fruit period，fruit enlarging period，netting period and mature period.The results showed that spraying with BTH in pre-harvest period had reduced significantly the latent infection rate of fungus.All the 4 treatments decreased the latent infection rate of fungus，but the second，third and fourth treatments had better effect.The latent infection rate of fungus in mature period was 23.53 % of the contrast.There was difference between A.alternata and Fusarium sp.with pre-harvest treatment.
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  Studies on Watermelon Drought Resistance Identification Indices and Method in Gravel-mulched Land of North-west China

  Liu Dongshun;Yang Wanbang;Zhao Xiaoqin;et al.

  . 2008, 1(7): 17-21.

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  The growth and physiological characteristics of 7 watermelon varieties and their parents were studied by artificial drought stress in pots，so as to filtrate identification indices for drought resistance.The result indicated that the accumulation amount of dry matters，the root-top ratio（R/T），relative water contents（RWC）were decreased by different degrees under dry conditions.The weaker drought resistance，the bigger decreasing ratio；while cell plasma membrane permeability，and praline（Pro）contents were increased.The weaker is drought resistance，the bigger is cell plasma membrane permeability，and the smaller is praline contents amplitude.Combining the yields of various hybrid combinations under cultivation conditions of gravel-mulched land，comprehensive evaluation was carried out on these indices by subordinate function value.There are correlations between index，subordinate function average value and yield of watermelon.So we can use the growth and physiological indices of watermelon for early prediction of drought resistance.
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  Effect of Exogenous Gibberellin on the Contents of Endogenous Hormones in Stem Apex of Broccoli

  Wang Tingqin;Yang Xian

  . 2008, 1(7): 22-25.

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  Different concentrations of exogenous gibberellin（GA）（50 mg•L-1，100 mg•L-1，150 mg•L-1）were sprayed on leaves of broccoli at the 20th day before and 10th day after inflorescence differentiation，respectively.The effect of exogenous gibberellin on the contents of endogenous hormones in stem apex of broccoli was studied.The results indicated that the development of broccoli was closely correlated with changes of endogenous hormones in plant.It was favorable for flower differentiation at inflorescence differentiation period to keep lower contents of IAA，GA1/3，and proper level of iPAs in stem apex，whereas proper levels of IAA，GA1/3，and keep lower content of iPAs was in favor of curd formation at curd emergence period.The balance of endogenous hormones was influenced by exogenous GA in stem apex of broccoli.The synthesis of IAA was inhibited by exogenous GA in stem apex，so its content decreased at both periods of inflorescence differentiation and curd emergence.The content of GA1/3 in vivo increased under treatment of low concentration of exogenous GA，but decreased under treatment of high concentration of exogenous GA.However，the changes of GA1/3 content in vivo exhibited the contrary tendency at curd emergence period.The content of iPAs increased with increment of the treated concentrations of GA at the stage of inflorescence differentiation.On the contrary，iPAs content decreased with increment of treated concentrations of GA at the stage of curd emergence.
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  Effects of Light，Temperature and Relative Humidity on the Growth of Alfalfa Sprouts

  Zhu Meiyun;Pan Zhili;Wang Yanping;et al.

  . 2008, 1(7): 25-26.

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  Elementary Studies on Pathogen of Eggplant Verticillium Wilt and its Differentiation of Pathogenicity in Heilongjiang Province

  Lin Mi;Zhang Peizhi;Guan Zhongyan;et al.

  . 2008, 1(7): 27-28.

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品种选育
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  A New Cucumber F₁ Hybrid —‘Zhongnong No.20’

  Gu Xingfang;Zhang Shengping;Wang Ye;et al.

  . 2008, 1(7): 29-31.

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  ‘Zhongnong No.20’is a new cucumber F₁ hybrid using inbred line 02484 as maternal parent and 02465 as paternal parent.Its fruit is about 30-35 cm in length with short neck and dark shining green skin.The fruit neck is less than 1/8 of the fruit length.It is good for supermarket sale.It has high resistance to ZYMV，WMY，resistance to angular leaf spot，downy mildew，powdery mildew，middle resistance to Fusarium wilt and CMV.The yield is over 150 t·hm^-2.It is suitable for open field cultivation in spring or summer and autumn.
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  A New Broccoli F₁ Hybrid —‘Bilu No.1’

  Ding Yunhua;Jian Yuancai

  . 2008, 1(7): 32-34.

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  ‘Bilu No.1’is a new broccoli F₁ hybrid developed by crossing CMS line CMS9507 as female parent and inbred line 9355 as male parent.It is middle-late maturity.The growing period from planting to harvest is about 80 days.The curd is compact in structure and semispherical in shape，with small and green buds and without leaf.Its stem is not hollow.The single curd weighs averagely 400 g.It has high resistance to TuMV and resistance to black rot.The yield is about 15 t·hm^-2.
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  A New Cauliflower F₁ Hybrid —‘Shengxue No.2’

  Hu Limin;Tao Xinglin

  . 2008, 1(7): 34-35.

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  Shengxue No.2’is a new cauliflower F₁ hybrid developed by crossing self-incompatible line 94-24 and inbred line 2001-23.Its growth vigor is middle strong.The flower looks tight and it is shaped round or tall round.Its color is white with good quality.The commercial flower curd rate is 96.4 %.It can be harvested about 75 days from planting to harvest in spring and about 90 days in autumn.In spring planting，its average curd weight is around 1.06 kg，and the yield is 40.5 t·hm^-2.In autumn planting，the average curd weight is around 1.18 kg，and the yield is 43.5 t·hm^-2.It is suitable to grow at most areas of northern China in spring and autumn.
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  A New Pea F₁ Hybrid —‘Baofeng No.5’

  Dong Lifeng;Wang Fengbao;Fu Jinfeng

  . 2008, 1(7): 36-38.

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  ‘Baofeng No.5’，semi-leafless pea，possessing earliness and high yield，was bred and selected from the multiple crossing combination‘Zhongwan No.6’and 90-E-10 and ‘Zhongwan No.5’.It has about 4.4 pods per plant and 5.8 seeds per pod and 1000-seed weight is about 217 g.The cultivar has normal bottle-green stipules，white pods and green round seeds.The rate of double-pod is over 40 %.It takes 94 days frow sowing to harvest.It has stronger resistance to damping-off，root rot and powdery mildew than‘zhongwan No.6’.It possesses high essential amino acids needed by human，and protein and fattiness in dry seeds are 21.17 % and 1.77 % respectively.Dry seeds yield is about 3 750 kg·hm^-2 and potential yield is 5 700 kg·hm^-2.It is suitable to be planted in east Hebei region.
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  A New Asparagus Bean Variety —‘Heyan No.2’

  Yang Lianyong;Song Wu;Guan Feng;et al.

  . 2008, 1(7): 38-39.

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  ‘Heyan No.2’is a new asparagus bean variety which is developed by system selection crossing between‘Quannengdoujiao’and‘Fengchan No.2’.It is early-mature.When planted in spring，it has a growing period of 90-100 days，its first flowering is in 45-50 days，first picking in 55-60 days.When planted in summer，its growing period is about 70-80 days，first flowering in 40-45 days，first picking in 45-50 days.Its pod is light green，54-59 cm in length，0.84-0.86 cm in diameter and about 24.5 g in weight.The yield is 34.5-39.0 t·hm^-2 in spring cultivation.It is suitable to be cultivated in spring and over summer to early autumn.
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  A New Pepper F₁ Hybrid —‘Saila No.1’

  Li Chengde;Song Xuedong;Zhang Zhengjun

  . 2008, 1(7): 40-41.

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  Saila No.1’is a new pepper F₁ hybrid by crossing inbred line B200326 as female parent from a local variety‘niujiaowang’in Inner Mongolia with inbred line No.28 as male parent from a local variety‘changyangjiaojiao’in Gansu.It is midearly maturing and has strong growth vigor and fruit setting ability.It is middle resistant to Phytophthora blight.Its tender fruit is dark green，mature fruit is dark red.The fruits are horn shaped，35.5 cm in length and 2.9 cm in width.The single fruit can weight about 76.8 g.The VC content is 86 mg·kg^-1.It is a good commercial variety.The yield is about 37.5 t·hm^-2 in open field in spring，about 72 t·hm^-2 in plastic tunnel in early spring and about 79.5 t·hm^-2 in solar greenhouse in winter.It is suitable to grow in northwest part of China.
专论与综述
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  Present Status of Studies on Technique for Identification of Resistance and QTL for Resistance to Tomato Gray Mold

  Zou Qingdao;Xu Ming;ZhangZijun;et al.

  . 2008, 1(7): 42-44.

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