Abstract:

To study the simplified cotton production technology, a field experiment was carried out to investigate the effect of topping and pruning on cotton. With transgenic insect-resistance hybrid cultivars ‘Huazamian H318’ as materials, 4 treatments (A, B, C, D) were set up. A, B, C, D was topping and pruning, topping and non-pruning, non-topping and non-pruning, non-topping and pruning, respectively. The results indicated that: topping could delay the mean maturity days by 5-6 days. Topping and retention of vegetation branches was beneficial to the dry matter accumulation of stem, leaf and reproductive organs. More bolls per plant, lower boll weight and lint percentage appeared to result from the retention of monopodium. When plant density was the same, non-pruning can produced the same yield as pruning. Topping and pruning had little impact on the fiber quality, so topping and non-pruning was the best.