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与冬小麦相比,春小麦穗小粒少,因此,依靠群体优势就成为春小麦高产的主要途径。为了研究在较好的肥水条件下春小麦收获穗数与分蘖茎数的关系,我们于1975—1980年对春小麦的个体和高产群体进行了定期定点调查,研究了单株和群体的分蘖成穗规律。六年的观察研究发现,春小麦的分蘖强度曲线(分蘖强度是指单位时间内单株或单位面积上群体所产生新分蘖的数量,它包括个体分蘖强度和群体分蘖强度,本文指的是群体分蘖强度),多有两个明显的高峰和一个低谷,谷期的茎数对于预测收获穗数、确定分蘖前期和拔节期管理有一定的指导作用。现将有关问题讨论如下。
Compared with winter wheat, spring wheat has fewer ears and small grains, therefore, it is the main way of high-yield spring wheat relying on group advantage. In order to study the relationship between the number of tillers and the number of tillers and tillers per spike in spring wheat under good fertilizer and water conditions, we carried out regular surveys on individual and high-yielding spring wheat populations from 1975 to 1980 and studied the law of tillering and panicle per plant and population . Six years of observational study found that the tillering intensity curve of spring wheat (tillering intensity refers to the number of new tillers produced by the population per unit area per unit area in a unit time, which includes individual tillering intensity and population tillering intensity, Intensity), there are two obvious peaks and a trough, valley stalks for the prediction of ear harvest, to determine the early tillering and jointing stage management has some guidance. The relevant issues are discussed below.