东亚小花蝽对西花蓟马和/或二斑叶螨危害豆株的定位反应

多食性天敌对其猎物植物系统的选择是其重要生物学特性之一,决定了对不同猎物控制的有效性。东亚小花蝽Orius sauteri是西花蓟马Frankliniella occidentalis(Pergande)及二斑叶螨Tetranychus urticae的重要捕食性天敌。本文在温室笼罩条件下通过释放东亚小花蝽,而后在不同时间调查其在西花蓟马和/或二斑叶螨危害2d后的豆株及健株上的数量,研究了其定位反应。结果表明:东亚小花蝽显著趋向西花蓟马及由西花蓟马与二斑叶螨同时危害的豆株,而较少趋向二斑叶螨单独危害的豆株及健株。在各处理豆株上,东亚小花蝽的日活动规律中,傍晚时分有离开植株的趋势。

豆天蛾的发生与防治

豆天蛾属鳞翅目，天蛾科。该虫以幼虫危害大豆叶片，轻则吃成网孔，重则将豆株吃成光秆，不能结荚，造成大豆减产40％左右．严重年份可造成大豆减产50％左右。

大豆新品种——鑫豆1号、2号

鑫豆1号、2号的特征特性 豆株高 该品种株高茂密,春播株高一般在1.65米以上,高可达1.80米,夏播可达1.50米,春播要求行距大、株距大、生权多;夏播行距、株距可适当略小,生杈偏少,为高杆大豆系。 节数多、花期长 该品种生长节数35～50节,鑫豆1号披针形圆叶、鑫豆2号为尖叶,冠层有多小叶,封顶穗、花浅白色。

大豆蚜虫的防治技术

大豆蚜虫是大豆的主要害虫之一，以成虫和若虫在豆株的顶叶，嫩叶和嫩茎上刺吸汁液。严重时布满茎叶，也可侵害嫩荚，造成植株矮小，结果枝和结荚数减少，千粒重降低，苗期发生严重时可使整株死亡，大发年如不及时防治，轻则减产20～30％，重则减产50％以上，我国主要大豆产区都有分布，而以东北三省的部分地区危害较重。

Study on the Mycorrhizal Formation in the Offspring Tissue Culture Seedling Bottle of Pinus elliottii with Lecanosticta acicola Resistance

[Objective] The research aimed to study the mycorrhizal formation in the offspring tissue culture seedling bottle of Pinus elliottii with Lecanosticta acicola resistance.[Method] The mycorrhizal formation of Pinus elliottii regenerated plant in vitro was studied,and the growth condition of regenerated plant was observed.[Result] The culture substrate and the inoculation amount of mycorrhizal fungi had the big influence on the mycorrhizal formation in vitro.After the root primordia were induced by Pinus elliottii caespitose shoots,it was best to transplant in the perlite substrate and inoculate Pisolithus tinctorius,which was favorable for the mycorrhizal formation.When the two blocks of Pisolithus tinctorius were inoculated in the perlite medium,the mycorrhizal formation rate reached 84.4%.The dichotomous branching short root was the most,and 12.49 roots were formed in every main root.The mycorrhizal formation improved the survival rate of regenerated plant domestication transplantation.The mycorrhizal regenerated plant grew well in the phytotron,and the root system was developed.[Conclusion] The research provided the basis for improving the survival rate of Pinus elliottii tissue culture regenerated plant with Lecanosticta acicola resistance.

Effect of Rhizobium Inoculation on Phosphorus Uptake,Yield and Quality of Soybean Plants

[Objective] This study aimed to investigate the effect of inoculation with various rhizobium strains on growth status, phosphorus uptake, yield and quality of soybean plants. [Method] Using Dongnong 42 and Dongnong 46 as experimental soybeans, four treatments were designed, including non-inoculated CK group and three treatment groups inoculated respectively with rhizobium strains R2, R, and Rs, to analysis the effects of rhizobium inoculation on growth status, phosphorus uptake, yield and quality of soybean plants. [Result] Inoculation with different rhizobium strains could significantly increase the biomass and phosphorus content of the roots and shoots of Dongnong 42, to be specific, rhizobium strain R2 showed the best ef- fect, followed by Rs, and those of roots were improved greater than the shoots; in- oculation with rhizobium could significantly increase the yield of Dongnong 42, and R5 showed the best effect, but the yield of Dongnong 46 was decreased; after in- oculated with rhizobium, the protein content and fat content of soybean were signifi- cantly increased, and R2 showed the best effect, but the effects on different varieties varied, to be specific, the protein content of Dongnong 42 was significantly in- creased, while the fat content of Dongnong 46 was significantly increased; different rhizobium strains inoculated to different soybean varieties showed different effects. Inoculation with suitable rhizobium can improve plant growth characteristics, promote phosphorus uptake of plants, increase soybean yield, and effectively improve soy- bean quality. [Conclusion] This study provides theoretical basis for solving the prob- lem of soil phosphorus deficiency, increasing soybean yield and improving soybean quality in the future.

Screening and Preservation of Douchi Fibrinolytic Enzyme Producing Strain

[Objective] To isolate and preserve a high-activity Douchi fibrinolytic enzyme producing strain from Douchi products. [Method] The Douchi flbrinolytic enzyme producing strain was screened on the selected medium prepared with self-made pork blood powder, the strain with the highest activity was screened out according to the size of hydrolysis cycle, and then preserved in LB medium. [ Rebait] A Douchi fibrinolytic enzyme producing strain with high thrombolytic activity was successfully screened out from the Douchi produced in Hunan, Guangdong and Jiangxi Prov- inces. [ Ceadusioe] The study lays foundation for the development of new-type thrombolytic drugs.