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以寒地粳稻松粳6号和寒地超级稻松粳9号为材料,在相同施氮量条件下,研究了不同氮肥运筹对寒地水稻茎蘖动态、有效穗数、分蘖成穗率及产量的影响。结果表明:减少基肥施氮比例、增加穗粒肥施氮比例两品种分蘖数到达峰值时间延迟,每平方米有效穗数和分蘖成穗率均呈增大的趋势,但比例过大时,每平方米有效穗数和分蘖成穗率反而下降;适当减少基肥施氮量,增加后期穗粒肥施氮量可以显著的提高穗粒数、结实率和产量,松粳6号和松粳9号两品种产量均表现为M2处理最高,与M3处理差异不显著,与其它处理差异显著。由此说明,合理比例的基肥、蘖肥、穗肥、粒肥配比才能实现水稻的高产,配比失衡对产量影响严重。
The cold paddy japonica rice Songjing 6 and the cold paddy super rice Songjing 9 were used to study the effects of different nitrogen fertilization on the tillering dynamics, effective panicle number, tillering rate and yield Impact. The results showed that: reducing the ratio of nitrogen fertilizer to basal fertilizer application and increasing nitrogen fertilizer application rate of spike fertilizer increased the peak time delay of tillering, the effective panicle number per square meter and the spike rate of tillering tended to increase. However, when the ratio was too large, The number of panicles and the percentage of panicle tillers became lower; the amount of nitrogen applied to basal fertilizer decreased and the amount of nitrogen fertilizer applied to basal fertilizer increased the number of grains per spike, the rate of seed setting and the yield of maturing grain. Songjing 6 and Songjing 9 The results showed that the yield of M2 was the highest, the difference with M3 was not significant, and the difference was significant with other treatments. This shows that a reasonable proportion of basal, tillering, panicle, grain and fat ratio in order to achieve high yield of rice, the ratio of imbalance on the output of a serious impact.