小麦分蘖芽发育规律及其有效性的研究

结果表明,小麦蘖芽出现与伸长跟母茎出叶或叶龄之间存在着严格的关系。主茎形成蘖芽数为冬性>半冬性>春性,导致蘖芽数变化的主要栽培因素是播期。决定分蘖和有效分蘖数多少的先决条件为播期。而确定分蘖、蘖芽有效率的主导因素是个体营养条件。主茎和有效蘖出叶数在冬前冬后的分配上具有规律性。通过分析表明争取有效分蘖必须采取措施,建立分蘖的冬前营养体,并需改善个体营养条件。

THE LAW OF TILLER BUD DEVELOPMENT OF WHEAT AND ITS AVAILABILITY

Results indicated that there existed the close relations between the appearance and elongation of tiller buds and leaf shoots on the main stems of wheat (T. aestivum L.) .The numbers of tiller buds formed from the main stems were winterness half winterness springness. The major factor causing this variation in the numbers of tiller buds was the seeding period. The prerequisite of determing the numbers of tillers and available tillers was also the seeding pei od, while the dominant factor in determing the effective efficiency of tiller nd tiller buds was the individual nutrient conditions. The main stems and he distribution of numbers of leaf appearance of available tillers prior to and posterior to winter were of regularity. The analytical results ind icated thatmeasures should be taken to strive for the available tillerSj the nutrient system must also be established prior to winter; and the individual nutrient conditions needed to be furtheri mproved.