花后喷肥对不同穗型小麦旗叶光合速率及籽粒产量的影响

Effects of Spraying Fertilizers after Flower on Photosynthetic Rate and Grain Yield in Different Spike-Type Wheat Varieties

为了探讨不同穗型小麦品种对花后喷肥的反应,选用大穗型和多穗型小麦品种为试验材料,研究了花后混喷多种肥料对2种穗型小麦品种旗叶光合速率、干物质积累及籽粒产量的影响。结果表明:花后喷肥可提高旗叶净光合速率,增加单茎地上干物质积累,多穗型品种豫麦49旗叶净光合速率和地上干物质积累增幅均大于大穗型品种宿2001。喷肥后茎节单位长度干重增加,茎节贮存物质有所增加,以宿2001较为明显。混喷多种肥料后2种穗型小麦品种的籽粒产量均显著高于对照,其中,豫麦49增产7.41%,宿2001增产6.35%,品种间差异不明显。

In order to ascertain the response of different spike-type wheat varieties to spraying fertilizers after flower, the large spike-type and multi spike-type wheat varieties were used to study the effects of spraying fertilizers on photosynthetic rate of flag leaf and dry matter accumulation above ground and grain yield. The results showed that the net photosynthetic rate of flag leaf and dry matter accumulation above ground of two spike-type varieties enhanced significantly because of spraying fertilizers after flower. Increase of the net photosynthetic rate and dry matter accumulation above ground of the multi-spike variety-Yumai 49 was more than that of large-spike variety-Su 2001.The substance saved in stem decreased owing to spraying fertilizers after flower, the nodal dry matter per unit in the large-spike variety-Sumai 2001 increased evidently. Grain yield of the multi-spike variety-Yumai 49 and large-spike variety-Sumai 2001 after spraying fertilizers was higher than that of the corresponding CK significantly and the yield increased by 7.41% and 6.35% respectively, but difference of grain yield in two varieties was not significant.