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文章分析了西藏作物病害的发生类群,提出大麦条纹,大麦条锈,蔬菜菌核病,苹果白粉病等20多种病害为西藏作物之主要病害,并分析了西藏作物病害发展的趋势,指出大小麦根腐病,小麦腥黑穗病,苹果白粉病,蔬菜病害将进一步发展。文章分析了西藏作物病害发生的生态学。根据其区域规律,初步区划为三个大区.六个小、区。分别是Ⅰ,喜玛拉雅热带亚热带大区(1,墨脱,察隅小区;2,喜玛拉雅南缘小区);Ⅱ,雅鲁藏布江下游,藏东三江流域南部大区(1,波密林芝小区,2,藏东三江流域南部小区);Ⅲ,藏中高原大区(1,谷地小区;2,高原面小区)。文章分析了西藏作物病害发生的时间动态规律。文章讨论了以青稞—条锈病菌,蔬菜—菌核病菌,肥麦—条锈菌为模式的西藏作物—病原物相互作用的原理。文章最后的分析了西藏作物病害系统的特征,指出西藏作物病害系统的空间结构呈金字塔形从东到西,从南到北病害种群和为害性递减,时间结构表现出脆弱性增加,稳定性递减,从青稞病害系统,到苹果病害系统,再到蔬菜病害系统,就明显地体现出这种规律。系统具有一定的封闭性与开放性。文章还提出了西藏作物病害系统的控制策略。
In this paper, the occurrence groups of crop diseases in Tibet were analyzed. More than 20 kinds of diseases such as barley stripe, barley rust, vegetable sclerotinia and apple powdery mildew were the main diseases in Tibet. The trend of crop diseases in Tibet was analyzed. Wheat root rot, wheat tart, apple powdery mildew, vegetable diseases will further develop. The paper analyzes the ecology of crop diseases in Tibet. According to the law of the area, it is initially divided into three large areas, six small areas. (Ⅰ, Medog, Chayu area; 2, the Himalayan southern marginal area); Ⅱ, the lower reaches of the Brahmaputra, the southern region of the eastern three rivers in Tibet (1, wave Jungle Chi district, 2, south of the eastern Tibetan Plateau); Ⅲ, the Tibetan Plateau region (1, valley plot; 2, plateau area). The paper analyzes the temporal dynamics of crop diseases in Tibet. The article discussed the principle of crop-pathogen interaction in Tibet with barley-stripe rust, vegetables-sclerotinia and wheat-stripe rust. The paper finally analyzes the characteristics of crop disease system in Tibet. It points out that the spatial structure of crop disease system in Tibet is pyramid-shaped from east to west, and from south to north, the disease population is decreasing and harmful, the time structure shows increasing vulnerability and decreasing stability , From the barley disease system, to the apple disease system, to the vegetable disease system, it clearly shows this pattern. The system has a certain degree of closure and openness. The article also proposed the control strategy of crop disease system in Tibet.