超高产春小麦灌浆特性研究

Studies on Grain Filling Characteristics of Super High Yield Spring Wheat Variety

选用黑龙江省春小麦育种史上有典型代表性的8个春小麦品种,结合高产、超高产小麦育种目标,分析了不同春小麦品种的产量特点及灌浆特性。结果表明:春小麦克丰4号、克旱16随着密度的增加产量明显增加,达到超高产的水平。8个春小麦品种的主穗籽粒干重变化可以用logistic方程拟合,均呈"S"曲线,其灌浆速率均呈单峰曲线,但峰值的大小与达到最大灌浆速率的时间不同。克旱16的灌浆速率为最高,可达0.1195 mg.d-1;而克丰4号是早熟、小粒、密植型品种,其特点是籽粒达到最大灌浆速率的时间提早,开花后12.6 d时达到最大灌浆速率,保证有效灌浆时间。

The experiment selects 8 spring wheat varieties which was the typical representative in spring wheat breeding history of Heilong, jiang. Combined with high yield or super high yield wheat breeding goal,the different spring wheat variety output characteristic and the grain filling characteristics were analyzed. The results indicated that the yield of Kefeng No. 4 and Kehan 16 obviously increased with the density, reached super high yield level. The dry weight changing of main spike could be fitted by the logistic equation,presented a shape of ＂s＂ ,its filling speed assumes unimodal curve,but there was rome differences between the peak value size and the time of maximum grain filling. The grain filling speed of Kehan 16 was the highest,may reached 0. 1195 mg·d^-1 ;Kefeng No. 4 is the early maturity,small seeds,and the close- planting variety,the time reached maximum grain filling speed always ahead of others, 12. 6 d after anthesis achieve the maximum grain filling speed and guarantee effective grain filling time.