我国旱地棉花生态区特点及农艺性状表现

Characteristic and Its Performances of Chinese Dryland Cotton Ecological Regions

研讨了我国旱地棉花生态区的生态特点、农艺性状及其变化规律。认为在诸多生态因素中,生育期降雨的季节性分布至关重要,由此而构成的受旱特点是区分旱地棉花生态区的重要依据,也是形成农艺性状变化规律最基本的因素。不同生态区的旱涝特点,是影响皮棉产量和农艺性状的主要矛盾,缓解这一矛盾或采取补偿措施是促进旱地棉花生产的基本方略。

The ecosystem characterization,agronomical character and its variant rule of three types of Chinese dryland cotton ecological regions were discussed in this paper.The research showed seasonal distribution of rainfall during growth period was the most important among many ecological factors,and the characteristic of tolerance to drought formed from this was the important key for distinguishing dryland cotton ecological regions and was also the most essential factor contining variant rule of agronomic characters.Drought and flood characteristics in differ- ent ecological regions was the main contradiction affecting output of lintcotton and agronomical character.The basic strategy enhancing dryland cotton production was to relax and resolve this contradiction or to take a compensatory measure(?)