摘要
甘肃省黄土高原区是果树花期遭遇晚霜危害比较严重的地区之一. 对兰州、定西等43个气象站1971～1980年地面基本气候资料统计分析表明,日平均气温稳定≥5 ℃后第2～5旬各旬霜冻日频率分别为4.68、3.54、2.04、1.00次/10年,日期每延迟1旬,霜冻日频率降低1次/10年以上.为此提出以下对策:(1)选择花期耐寒品种;(2) 人工延迟果树花期;(3)利用腋花芽结果;(4)果树区划中注意各类果树花期遭遇晚霜危害的可能性.
The loess plateau area of Gansu province is one area suffered the late frozen injury seriously in fruit trees＇ blooming. The statistie analysis of elimate material of 43 weather station during 1971 -1980 indicated ： the daily frequeney of frozen injury of the second to fifth 10 days is 4.86, 3.54, 2.04 and 1.00 times per 10 years respectively after mean steady daily temperature ≥5 ℃, and it will decrease over I times per 10 years. In the light of the situation above, the paper has put forward corresponding countermeasures followed as： 1） to seleet cold toleranee varieties of fruit tree＇s blooming; 2） to prolong fruit tree＇s blooming artificially; 3） to produee fruit by using axillary flower bud; 4） to take consideration of possibility of fruit tree＇ s blooming suffering frozen injury.
出处
《甘肃林业科技》
2005年第4期34-37,共4页
Journal of Gansu Forestry Science and Technology
关键词
果树花期
晚霜冻害
霜冻日频率
对策
blooming of fruit trees
injury of late frost
daily frequency of frozen injury
countermeasures
