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小麦拔节期是从麦苗起身到孕穗前的一段生长发育时期。这时正值小花分化,营养生长和生殖生长并进,是小麦一生中生长量最大、生长速度最快的时期。这时合理进行施肥灌水,能有效地增加结实小花,提高穗粒数,延长上部叶片的功能期,有利于后期籽粒的形成和灌浆。同时还能使穗下茎节伸长和加粗,促进穗的发育。因此,小麦拔节期田间管理必须抓好以下几点:
The jointing stage of wheat is from wheat seedling up to the booting stage before a period of growth and development. This time coincided with floret differentiation, vegetative growth and reproductive growth go hand in hand is the largest growth in wheat growth, the fastest growing period. At this time reasonable fertilization and irrigation, can effectively increase the floret floret, increase the number of grains per spike, extend the functional period of the upper leaves, is conducive to the formation of grain and grain filling later. At the same time, it can elongate and thicken the stem section of ear to promote the development of ear. Therefore, field management of wheat jointing must grasp the following points: