不同施肥量对无核‘大十’果桑生长和果实品质的影响

Effect of Different Fertilizer Amounts on the Growth and Fruit Quality of Seedless‘Big Ten'Mulberry

为促进果桑生长,提高果桑产量和改善果实品质,以无核‘大十’果桑为试材,首先探讨不同梯度的复合肥施用量对果实单果重、株产量、新稍生长量、可溶性固形物、氢离子浓度指数等指标的影响,然后采用模糊数学隶属函数公式对不同施肥处理进行综合评价。结果表明:虽然施肥对果桑氢离子浓度指数的影响较小,但可显著促进果桑生长,改善果实品质。当施肥量由100 g/株增加到150 g/株时,果实的单果重、株产、可溶性固形物分别显著增加了23.51%、26.69%、39.63%,但新稍生长量与氢离子浓度指数的变化则较小。当施肥量由150 g/株增加到250 g/株时,株产增加幅度仅为8.32%,可溶性固形物下降了18.60%。隶属函数综合分析结果认为,无核‘大十’果桑的适宜施肥量应控制在150 g/株为宜。

This study was conducted to quantify the impact of different fertilizer amounts on the growth andfruit quality of mulberry.A field experiment with treatments of different fertilizer amounts at germination stagewas performed and single fruit weight,yield per plant,new shoot,soluble solids,as well as hydrogen ionconcentration index of seedless‘Big Ten＇mulberry were determined.Membership function formula of fuzzymathematics was used to compare and explore the best fertilizer amount which could improve the growth andfruit quality of mulberry.Result showed that fertilizer amount had no significant effect on hydrogen ionconcentration,but it could improve mulberry growth and fruit quality.Along with fertilizer amount increasingfrom 100 g to 150 g per plant,the single fruit weight,yield per plant,and soluble solids increased by 23.51%,26.69%,and 39.63%,respectively.However,new shoot growth and hydrogen ion concentration index had nosignificant difference.Additionally,no significant difference of new shoot growth,hydrogen ion concentrationindex as well as soluble solids of mulberry was found between fertilizer amount of 100 g and 150 g per plant.When fertilizer amount increased from 150 g to 250 g per plant,the yield per plant increased by 8.32%,whilethe soluble solids decreased by 18.60%.According to the analysis of membership function,appropriatefertilizer amount of mulberry was 150 g per plant.