High quality cotton has shown different boll development and fiber quality,the objective of this study was to investigate the effects of potassium on boll development of different positions and the influence of endogenous hormone mechanism in high quality cotton.

In the earlier stage of boll development,higher contents of IAA and ZR(within 30 days) and GA3 (within 20 days)were also detected in the boll shell and seed co.

The boll development and formation of "Kemian 2" with high quality was studied in this paper.

Cotton boll development of wheat summer cotton double cropping was affected by two factors which were planting ways and climatic condition that temperature factor was the leading role.

According to quite a number of research results, this review first made it clear that plant hormones could transport from other organs to cotton boll through phloem.

The results showed that:①According to its variability,the cotton boll quality charaters could be divided into 3 types.

The results showed as follows: cotton bolls volume and protein content in seed were significantly increased by nitrogen application.

Effect of Nitrogen Fertilizer Application on Development of Boll and Fiber Quality in High Fiber Quality Cotton

The CCRI 29 and 33B were sowed in three different dates (4/15, 4/21 and 4/29) and the dynamics of dry matter accumulation of boll shell and seed cotton with different parts of the cotton plant (upper, middle, lower) were examined, respectively.

During the development of the bolls ,the increment of the single boll of transgenic insect resistant hybrid cotton line Sukang 102 lies on ,according to the average of 1997 and 1998 ,the dry weight of fibre increase by 16.