Abstract:

Abstract: Hydroponic culturing experiment was conducted to study screening of the potassium high efficiency among 12 cotton varieties. The result indicated that there were great difference among cotton varieties in the low potassium ability, cutivars siyang 328, jin 106, jinnongmian 3, longzamian 2 had stronger absorption ability, higher dry matter accumulation,and higher K utilization index in low K level which was contrary to xiangzamian 7, jin 102, longzamian 1, xiangnongmian 8. Potassium high-effect varieties chlorophyll contents are higher than low effect varieties, indicate that the potassium high-effect varieties have the ability transshiping potassium comparatively by force to the ground part , can maintain the cotton blade chloroplast physiology function. With the fact that potassium thickness comes down, potassium high-effect varieties MDA contents are lower than the low effect varieties, this oneself film system stability explaining the potassium high-effect varieties is fairly good , inverse is stronger in encountering low potassium coercing time to resist.