Influence of Astragalus Straw Substrate Optimization on the Yield and Benefit in Mini-tuber Production
The reuse of agricultural waste resources has become an important part of the development of modern green agriculture.In order to select a new type of culture substrate suitable for the production of mini-tuber in Longzhong region,the experiment involved the establishment of nine treatment groups based on varying proportions of Astragalus straw,turfy soil,vermiculite,and coconut bran matrix.The physicochemical properties of the different compound matrices were analyzed,and their impact on plant height,stem diameter,and mini-tuber yield was evaluated.The plant height and stem diameter of virus-free seedlings cultured on a mixture containing 10%Astragalus straw,50%turfy soil,and 40%coconut bran exhibited the highest value throughout the entire growth period,and the number of mini-tuber reached 605.00/0.6 m2,which increased by 62.63%and 34.05%compared to the two controls,vermiculite and coconut bran,respectively.These differences were statistically significant when compared to the control treatments(P<0.05).In this treatment,the highest number of mini-tuber was observed in the weight ranges of 2-<5 g,5-<10 g,and 10-20 g.Compared to vermiculite used only,this treatment resulted in an increase in input-output ratio by 58.91%.Therefore,a mixture containing 10%Astragalus straw,50%turfy soil and 40%coconut bran could be used as a new cultivation substrate to improve the yield and economic benefit in mini-tuber production.
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