施氮量与机插密度对桃优香占群体动态和产量的影响

Influence of Nitrogen Application and Machine Transplanting Density on the Group Dynamic and Yield of TaoYouxiangzhan

采用裂区二因素两向分组完全随机试验,研究了机插条件下施氮量与密度对桃优香占群体动态和产量的影响。结果表明:行距固定25cm,同一施氮水平下,株距选插10 cm,有利于增加同期茎蘖数,但分蘖率和成穗率下降,对群体有效穗形成有负效应。机插密度(株距10、12 cm)对有效穗和单产的影响达到显著水平;施氮量及施氮量×机插密度互作对有效穗、穗平总粒和单产的影响达到显著或极显著水平。在120~180 kg/hm^2施氮区间,单产随施氮量增加而递增,施氮150 kg/hm2与株距10 cm及施氮180 kg/hm^2与株距12 cm两种肥密组合有利发挥桃优香占产量潜力。

Under the condition of machine insertion, the effects of nitrogen concentration and density on the group dynamic and yield of Tao Youxiangzhan were studied by using two factors of split zone with a completely randomized trial. The results showed that under the same nitrogen level, 25 cm of fixed spacing, and 10 cm of planting distance is beneficial to increase the same period stem tillers number, but the rate of tillering and earing rate dropped, and have negative effects on group effective panicle formation. The effect of machine thrust density（planting distance cm 10 or 12 cm） effect on the effective ear and yield was significant; The effect of nitrogen fertilizer and machine transplanting density to effective spikes, panicle total grain and single yield was significant or very significant. In 120-180 kg/hm^2 nitrogen fertilizer interval, yield increase with the increase of nitrogen application, the combination of 150 kg/hm^2 of nitrogen with 10 cm of planting distance and 180 kg/hm^2 with 12 cm distance, could make the best yield of Tao Youxiangzhan.