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一、掐尖与打杈的作用有的作物需要掐顶尖,有的作物顶尖和侧枝尖都要掐,有的作物需要打杈,有的作物掐尖和打杈都要进行。这样做是为了合理地调节植株体内营养物质的分配和运输,协调营养生长和生殖生长的矛盾,使养分集中供给有效花果,对防止贪青徒长,促进早熟,提高产量,改善果实品质都有重要的作用。二、掐尖与打杈的技术 1、棉花:在进行整枝管理时,一要进行打水杈,即除掉第一个果枝以下的叶枝,应在果枝与叶枝明显分开时进行;二要打顶尖,既不能过早,也不能过晚,要因地制宜确定日期;三要打围尖,即打去果枝的尖梢,当每
First, the pinch tip and the role of twigs Some crops need to pinch the top, and some crop tip and pinch to pinch, and some crops need to fight twisting, and some crop pinch point and twigs should be carried out. This is done in order to reasonably regulate the distribution and transport of nutrients in plants, to coordinate the contradiction between vegetative and reproductive growth, and to concentrate nutrient supply on effective flower and fruit, and to prevent corruption, increase precociousness, increase yield and improve fruit quality Important role. Second, the pinch tip and the technique of breaking the twig 1, cotton: pruning in the management, we must first play a water bifurcation, that is, get rid of the first foliage below the fruiting branch should be in the branches and leaf branches were clearly separated when; Top, neither too early, nor too late, to date to determine the local conditions; three to play apron, that hit the tip of the fruiting branch, when each