高频刈割对水培下不同品种苜蓿产量及品质的影响OA

The experiment aimed to investigate the growth adaptability of different alfalfa varieties under shallow water flow cultivation system and continuous high-frequency cutting conditions.Three alfalfa varieties,Zhongcao 13,WL440HQ,and WL525HQ,were used as materials and subjected to 12 consecutive cuts using shallow water flow cultivation technology in a controlled environment indoor.The hay yield,leaf stem ratio,crude protein(CP),neutral detergent fiber(NDF),acidic detergent fiber(ADF)and other indicators for each crop were measured,and the relative feeding value(RFV)was calculated.A comprehensive evaluation of the data using path analysis,principal component analysis,and membership function method was conduct.The results showed that the comprehensive evaluation value(D value)of WL440HQ was the highest(0.731),and its hay yield was significantly higher than other varieties(P<0.05),the CP content could reach more than 30%,and the concentrations of NDF and ADF were significantly lower than those of Zhongcao 13(P<0.05),indicating excellent nutritional quality.The D value of WL525HQ was 0.616,indicating acceptable quality performance but insufficient yield stability.The D value of Zhongcao 13 was 0.245,and all indicators were relatively low.The cutting frequency had a significant impact on yield and quality.WL440HQ and Zhongcao 13 both showed the highest hay yield in first crop,while CP content and RFV showed a rebound trend in middle and later stages(9th to 12th crop).The comprehensive ranking of membership functions was:WL440HQ>WL525HQ>Zhongcao 13.The study shows that WL440HQ is an ideal variety with both high yield and high quality potential in hydroponic high-frequency harvesting systems.