新疆机械采棉技术发展的系统分析与思考

机械采棉技术是一项涉及诸多学科的系统工程.为此,从棉花生产、轧花加工和纺纱生产这一棉花产业链的角度出发,对新疆发展机采棉的机遇和优势、威胁和挑战进行了系统分析.其中,对新疆手摘棉、机采棉和进口美棉的质量进行了对比分析.最后,提出发展机采棉必须将长期目标与短期目标结合起来,在稳步发展的前提下,提高质量,优化工艺,以实现较高的综合经济效益.     

Effects of method of harvest and interval between harvests on edible leaf yield in fluted pumpkin

Two crops of fluted pumpkin (Telfairia occidentalis Hook.f.) were grown in the field and the effects of 3 methods of harvest and 4 intervals between harvests were studied.Frequent harvests (3- or 4-week intervals) yielded more edible leaf than infrequent harvests (6- or 8-week intervals) by inducing greater branching, allowing for more flushes and providing between and regular timing for taking advantage of new flushes following each harvest. Although significant differences in yield were not obtained among the 3 methods of harvest, harvesting by pruning appeared to be preferable, because it is a faster operation than either hand-picking or alternation of harvest-pruning and hand-picking methods. Extra benefits in harvest-pruning could come from yield of tender apical shoots which are also edible.