两种抗生细菌拌种飞播造林试验

Study on the Air Sowing of Seeds Mixed with Two Antagonistic Bacteria

飞播造林是加快荒山绿化、提高森林覆盖率的有效途径,如何提高飞播造林的成效和质量,降低成本,减少病虫的危害已成为当前飞播造林中亟待解决的问题。为此,1991年应用松针上分离到的两种抗生细菌,P751和Bc752菌株制剂——农丰菌2号和1号处理马尾松(Pinus massoniana Lamb.)种子,在贵州省凤岗县5个播区10533hm^2进行飞播造林试验。

Two preparations of antagonistic bacteria, Pseudomonas sp. (P751), Bacillus cereus Fr. (Bc 752)--NONGFENGJUN were mixed separately with the seeds of Pinus massoniana Lamb, on large scale cultivation pf air sowing. In 10 533 hm2 trial area, the result shows that the effect of NONGFENGJUN No.2 (P 751) is better that of No.1 (Bc 752). The effect of air sowing increased by an average of 39.5 %, the averege seedling height by 31.0%, the average length of seedling needle by 14.0%, the average seedling number by area by 79.9 % and the average incidence of diseases, Cercospora pini-densiflorae and dampping-off are reduced by 67.3%. The average effect of diseases control is 97.8%. The effect of Bc 752 is better than that of P 751, reducing the average incidence of diseases by 97.9 %.