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紫苜蓿褐斑病发生危害的调查研究
Investigation on Occurrence and Damage of Pseudopeziza Medicagines (Clib) Sacc
【摘要】 采用定点定期采样、调查、测定的方法,研究了紫苜蓿褐斑病的发生危害的程度及发病条件。结果表明;呼伦贝尔盟紫苜蓿褐斑病的发病日期与病情指数间呈显著正相关(R=0.9041,N=11)。在苜蓿与禾草混播的草地,每平方米内苜蓿的枝条数与病情指数间呈显著的正相关(R=0.7781,N=10);病情指数与茎叶比也呈显著的正相关(R=0.9076,N=6);病情指数与单枝叶片数呈显著的负相关(R=-0.7805,N=10)。
【Abstract】 This paper studied the density and the condation of Pseudopeziza medicaginis (Clib) Sacc with the method of sampling, investigation and measurement in definite spots and times. The results showed that: There are significantly positive correlation between the disease index and the disease date (25, July was zero, r = 0. 9041, n = 11), between the disease index and the quantity of branches of alfalfa per m2 (r = 0. 778, n = 10 )and between the disease index and the ratio of stems and leaves of alfalfa (r=0. 9076 , n = 6 ). The correlation between disease index and the number of leaves in each stick is significantly negative (r=-0. 7805, n=10).
【Key words】 Pseudopeziza medicaginis (Clib) Sacc; Occurrence and damage; Disease index;
- 【文献出处】 哲里木畜牧学院学报 ,JOURNAL OF ZHELIMU ANIMAL HUSBANTRY COLLEGE , 编辑部邮箱 ,1998年01期
- 【分类号】S435.4
- 【被引频次】17
- 【下载频次】93