论文部分内容阅读
以新麦草为材料,在河北坝上高原区种子生产实验研究中得出:在生育期中灌水6 次、磷酸二铵做种肥的条件下,施化肥对新麦草种子产量影响显著,秋施45kgN/hm2+45kgP2O5/hm2、春施90 kgN/hm2 时种子产量最高,为265.1 kg/hm2;新麦草种子产量的首要影响因素是单位面积生殖枝数,生殖枝主要由上年果前短营养枝转化,秋春施氮可以增加果前短营养枝/m2,使第二年生殖枝数/m2 增加。同一施氮量下,秋春分施氮肥与春季一次施氮处理之间,小穗数/生殖枝、小花数/小穗、种子数/小穗及种子千粒重差异不显著。
New wheatgrass was used as material in the experiment of seed production in Bashang Plateau of Hebei Province. The results showed that under the conditions of irrigation 6 times during the growth period and DAP as seed fertilizer, / hm2 +45 kgP2O5 / hm2, and the highest seed yield was 265.1 kg / hm2 when spring application was 90 kgN / hm2. The primary influencing factor of seed yield was the reproductive branch number per unit area, Transformation, N fertilization in autumn and spring can increase the number of short vegetative shoots / m2, which increases the number of reproductive branch / m2 in the second year. Under the same nitrogen application rate, there was no significant difference between spikelet number / reproductive branch, floret number / spikelet, seed number / spikelet and seed grain weight between autumn and spring nitrogen application and spring nitrogen application.