为了探索促进黑龙江大庆地区早熟禾(Poa pratensis L.)健壮生长的施肥方式, 比较了施用KNO₃复合肥 0(对照)、116.50、138.20、161.30 kg/hm²后早熟禾在不同时期的鲜重、含水量、叶绿素a、b和类胡萝卜素含量。结果表明, 早熟禾鲜重随着KNO₃施用量增加而增加, 161.30 kg/hm²处理整个试验期间均显著(P<0.05)高于对照, 植株含水量6、10月份116.50~161.30 kg/hm²处理高于对照, 7、8月161.30 kg/hm²显著高于对照; 整个试验期间, 161.30 kg/hm²处理叶绿素a、b和类胡萝卜素含量均显著高于对照。综合分析认为161.30 kg/hm²处理可以显著改善早熟禾生长性状。

Fresh weight, water content, chlorophyll a, b and carotenoid content of Poa pratensis L.are recorded and compared at different times after 0(control), 116.50, 138.20, 161.30 kg/hm² KNO₃ fertilizer is applied to explore fertilization methods for a robust growth of Poa pratensis L.in Daqing, Heilongjiang.The result shows that the fresh weight ofPoa pratensis L.increases with KNO₃ fertilizer, 161.30 kg/hm² treatment is significantly higher(P<0.05)than that of control group, the water content of Poa pratensis L.plant is higher than that of control group in 116.50 to 161.30 kg/hm² treatment when in June and October and the 161.30 kg/hm² treatment is significantly higher(P<0.05)than that of control group in July and August.Throughout the test, 161.30 kg/hm² treatment’s chlorophyll a, b and carotenoid content are significantly higher than that of the control group.Therefore, it is safe to come to a comprehensive analysis, that is, the 161.30 kg/hm² treatment can significantly improve the bluegrass growth traits.