聚天门冬氨酸对紫花苜蓿生物学性状及产量的影响

采用叶面喷施法研究了5个不同质量浓度聚天门冬氨酸(PASP)处理(20,40,60,80,100 mg/L)对紫花苜蓿(Medicago sativa)干草产量及生物学性状的影响。结果表明:不同质量浓度的PASP对紫花苜蓿一年3茬每茬次的干草产量具有不同影响,20、406、0 mg/L的PASP可显著提高年干草产量(P0.05),其中20 mg/L对提高苜蓿产量最明显,全年干草产量为14 424.03 kg/hm2,比对照增长了13.68%。喷施PASP对紫花苜蓿生物学性状也具有不同影响,20 mg/L的处理对株高、叶面积和节间数促进作用最好,对茎粗促进作用最好的是40 mg/L的处理,分枝数以60 mg/L的处理最高。

Effect of foliar application of PASP on the biological characteristics and yield of alfalfa

The effect of foliar application of PASP with different application rates on the yield and biological characteristics of alfalfa was studied and the result indicated that the PASP application could remarkably increase the hay yield of alfalfa at a proper application rate (P<0.05), and the best was 20 mg/L, the hay yield were 14 424.03 kg/hm2 which was 13.68% more than CK. The biological characteristics of alfalfa were also influenced by the treatments. The height, leaf area and internode number reached the maximum at 20 mg/L. The stem diameter and shoot number reached the highest at rates of 40 mg/L and 60 mg/L respectively.