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一、试验概况扬州地处长江下游两熟棉区,棉花与前作物共生期较长,在春温上升不稳,梅季多阴雨,并多伏旱、秋雨的气候条件下,棉花生产上常出现棉苗迟发、蕾期或花期水发疯长、后期早衰(尤其是沙土地)等问题.为了克服两熟矛盾和战胜自然灾害,争取棉花苗期早发、蕾花期稳长、后期健壮多结桃,1968年以来,我们在扬州我院内进行有关栽培试验.头几年,针对我院缺钾沙土地易早衰的问题,增施有机肥,加强后期肥水管理,基本上避免了早衰,产量上升到200斤左右.近年来在探索减轻梅季水害(“水发”或“疯长”)的过程中,产量继续有所上升,但不显著.1978年战胜了长期干旱,获得了亩产皮棉286斤.现以这一年情况为主,将有关试验结果,报告如下:
First, the test profile Yangzhou is located in the Yangtze River two cotton fields, cotton and pre-crop long symbiotic period, rose in the spring temperature instability, more rainy season, and more drought, autumn climatic conditions, the cotton production often appear In order to overcome the conflict between the two crops and overcome the natural disasters, cotton seedlings are strived for the early seedling stage, the stable flower bud stage, the later strong and multi-knot Peach, since 1968, we carried out the cultivation experiment in our hospital in Yangzhou.In the first few years, in response to the problem of premature senescence in potash-deficient sandy land in our hospital, organic fertilizer was added to strengthen post-fertilizer management, which basically avoided premature aging and increased the yield To about 200 kg in recent years to explore the mitigation of Meijin water damage (“water” or “crazy”), the output continued to rise, but not significant .1978 defeated the long-term drought, access to a lint per mu 286 The present situation is mainly based on the test results, the report is as follows: