【摘要】 连续3年茎蘖动态分析表明,高沙土麦作区在10月底～11月初播种,基本苗180～270株/m2情况下,播后25～30天茎蘖达到预期成穗数390～450株/m2;小麦产量由主茎及主茎1叶、2叶、3叶产生的分蘖成穗构成。最高产量时的氮肥施用水平为213.2kg/hm2,产量为5782.5kg/hm2。拔节期施用NPK三元素肥料具有显著提高实粒数,增加千粒重等作用,增产效果显著。更多还原

【Abstract】 The stem tiller dynamic analysis for three years in succession indicates seed from the end of October to the beginning of November in the high sandy soil wheat making area. The basic shoot is under 180～270 situations per square meter the stem tiller reaches 390～450 for several each square meter ears of gain of expectancy on 25～30 days after sowing. Wheat output is formed of main stem and the first leaf, the second leaf, the third leaf of main stem produce to divide into tiller become ear of grain. Nitrogen quantity test indicate Nitrogen on the high yield use competence 213.2kg/hm2 and the output is 5782.5kg/hm2. Jointing fat to use test indicate jointing stage use N P K element fertilizer have and improve real one count notably. Increase a thousand grains of function such as being in weight, it is remarkable to increase the production of the result.更多还原