The results showed that (1) The R of high yield cotton was 26 2% lower than that of common cotton (CK) in night time, but total photosynthetic amount was 46 1% higher at bearing boll period.

Effects of agrochemicals on activity of catalase, peroxidase in cotton are conducted by a trial with spraying several pesticides over cotton.

The meteorological conditions at seed-time of cotton covered with plastics film at present productive level in Akesu are grouped with fuzzy method.