不同混交模式的甜龙竹竹笋品质的差异特征OA

To explore the effects of different mixed planting modes on the shoot quality of Dendrocalamus brandisii,three mixed modes of D.brandisii(i.e.,D.brandisii-Camellia sinensis,D.brandisii-Betula alnoides,and D.brandisii-Juglans regia)were selected with the pure stand of D.brandisii as the control.The appearance traits and nutritional components of bamboo shoots in the pure stand and different mixed modes were determined,and the differences in shoot quality were comprehen-sively evaluated using correlation analysis,principal component analysis(PCA),and membership function analysis.The results showed that:(1)Compared with other modes,the D.brandisii-B.alnoides mixed mode significantly increased the basal diameter of bamboo shoots(13.40 cm),and also showed relatively high levels in single shoot weight(2.57 kg)and edible rate(72.51%),thus improving the appearance quality of bamboo shoots.(2)The D.brandisii-J.regia mixed mode exhibited the greatest potential in enhancing the edibility of bamboo shoots.(3)The D.brandisii-C.sinensis mixed mode significantly increased the content of crude protein(16.38 mg·g-1),as well as the proportions of umami amino acids(5304.80μg·g-1,including aspartic acid and glutamic acid)and sweet amino acids(3358.81μg·g-1,including glycine and proline),thereby improving the nutritional value and flavor.(4)Principal component analysis indicated that the key driving factors affecting bamboo shoot quality were tannin,crude protein,soluble sugar,edible rate,weight,basal diameter,and crude fat.The results of membership function analysis showed that the comprehensive quality of bamboo shoots under different mixed modes was in the order of D.brandisii-C.sinensis＞D.brandisii-J.regia＞pure stand of D.brandisii＞D.brandisii-B.alnoides.Therefore,different mixed planting modes have varying effects on D.brandisii shoots,and the D.brandisii-C.sinensis mixed mode yields the best comprehensive quality of bamboo shoots.