不同硝酸钾用量对早熟禾生长性状的影响
Effect of Different Amount of KNO3 on Poa pratensis L.Growth Traits

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),116.50,8.20,1.30 kg/hm2KNO3 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.