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豆科植物根际土壤微生物对根瘤菌活动性的影响,早已引起了土壤微生物学者们的注意(1944,1946;1952;Harris,1953;1953,1954;1954)。Bottomley的研究表明,根瘤菌与自生固氮菌(Azotobacter)混合接种,比根瘤菌单独接种更为有效。以霉状芽孢杆菌(Bacillus mycoides)与根瘤菌混合接种也得到了同样的结果。和的研究都指出了,豆科植物根部微生物羣对根瘤菌的发育及其活动性有很大的影响。把能刺激根瘤菌繁育和提高根瘤菌活动性的土壤细菌,称之为“细菌-活化剂”。他用自生固氮菌和极毛杆菌属的某些种,例如,萤光极毛杆菌(Pseudomonas fluorescens),作为细菌活化剂与根瘤菌混合接种,提高了根瘤菌的侵染力和活动性,并且提高了豆种植物的产量。在他用多粘芽孢杆菌(Bacillus polymyxa)、放射形土壤杆菌(Agrobacterium radiobacter)等土壤细菌与根瘤菌混合接种得到的结果中,提出了一个新的见解。他认为这些土壤细菌对根瘤菌的有益作用是在于它们
The effects of rhizosphere microbes in legumes on the activity of Rhizobia have long drawn the attention of soil microbiologists (1944, 1946; 1952; Harris, 1953; 1953; 1954; 1954). Bottomley’s research shows that inoculation with Rhizobium and Azotobacter is more effective than rhizobia alone. The same result was obtained with a mixture of Bacillus mycoides and rhizobia. Studies have pointed out that the legume root microflora has a great impact on the development of Rhizobia and its activity. Soil bacteria that stimulate rhizobial breeding and increase rhizobia activity are termed “bacteria-activators.” He inoculated with certain strains of Azotobacter and Pasteurella, such as Pseudomonas fluorescens, as bacterial activators in combination with Rhizobium, increased rhizobial infectivity and mobility, and Increased bean plant yield. In his use of Bacillus polymyxa (Bacillus polymyxa), Agrobacterium radiobacter (Agrobacterium radiobacter) and other soil bacteria and Rhizobium mixed inoculated the results obtained, put forward a new idea. He thinks the beneficial effects of these soil bacteria on rhizobia lie with them