摘要
杉木球果炭疽病发生进程与气温和相对湿度有显著的相关性。经多元回归分析,回归方程y=0.34x_2-0.17x_1-19.7,相关系数R=0.5217>P_(0.05)=0.5132。发生期4月上、中旬,5月上旬为1年发病的最高峰,6月中旬出现第二次高峰,8月上旬基本停止发病。 分别对健果和重病果种子重量、千粒重和发芽试验比较,受害严重的球果种子重量损失31.75～40.65％,千粒重损失19.9～20.4％;种子室内发芽率损失17.0～74.5％;场圃发芽率损失29.8～54.2％。经方差分析,病、健种子重量和质量均有显著的差异。
The course of anthracnose of China fir cones is obviously interrelated with air temperature and relative humidity. As a result of multivariate regression analysis, regression eguation is y=0. 34x_2 -0. 17x_1-19. 7,and corerelated coefficient is R=0. 5217# >P_(0.05) = 0. 5132. The anthracnose occurs in the first and middle ten days of April,prevails in early May,again peaks in the middle ten days of June,and then basically stops in the first ten days of August.
As compared with healthy cones, the seed weight of heavily-diseased cones lost 31. 75 -40. 65% ,its thousand-grain weight lost 19. 9~20. 4% ,its indoor germination percentage lost 17. 0~ 74. 5%,and its field germination percentage lost 79. 9-54. 2%. Variance analysis has shown that diseased and healthy seeds have an evident difference in weight and quality.
出处
《四川林业科技》
北大核心
1993年第2期22-26,共5页
Journal of Sichuan Forestry Science and Technology
关键词
杉木
炭疽病
发病规律
种子损失
China fir,anthracnose,disease development law,loss of seeds
