氮肥基追比对不同穗型优质小麦产量及品质的影响

Effects of the Ratio of Bas N and Application N on Grain Yie ld and Quality of Two Wheat Varieties with Different Spike Type

研究了总施氮量 2 4 0kg/hm2 的条件下 ,氮肥基追比对不同穗型小麦品种产量与品质的影响。结果表明 ,增加追氮比例产量增加 ,品质改善 ,但不同穗型品种之间存在差异。就多穗型品种而言 ,少施底氮 ,重施追氮 ,产量增加较多 ,形成时间、评价值及曲线面积等品质指标明显改善 ;大穗型品种随追氮比例增大品质有所改善 ,但幅度较小 ,重施底氮 ,少量追氮 ,产量较高。试验结果显示 ,多穗型品种以氮肥基追比 5∶5或 3∶7为宜 ;大穗型品种以 7∶3为宜。

An experiment is carried out that effect of N application at different rates on grain yield and quality of two wheat varieties under the total pure N 240 kg/hm 2.The results indicate that increasing N application rate can enhance gr ain yield and quality but there are different between two wheat varieties. Littl e base N and more application N at jointing stage increase grain yield and impro ve development time,value and curve area significantly for muli spike type whe at variety. Increasing N application has little effect on grain yield of large spike variety. Keeping more base N and little application N is benefit for large spike variety increasing grain yield and improving quality. Considering grain yield an d quality, base N 50% and application N 50% or base N 30% and application N 70% is suitable for muli spike variety. In the meantime base N 70% and application N 30% is suitable for large spike variety.