新疆白桦树液化学成分研究

A STUDY ON THE CHEMICAL COMPOSITION OF BEYULA SAP IN XINJIANG

本文对新疆布尔津平原林场的春采白桦树液的化学成分进行了研究，其干物质含量为１．３６—１．４２％，ｐＨ值５．６９—６．４４，总氮含量为４．５—９．５ｍｇ／１００ｍｌ，总氨基酸含量２０—３０ｍｇ／１００ｍｌ，总糖含量１，１—１．４％，以果糖和葡萄糖为主。总酸含量２５—５５ｍｇ／１００ｍｌ，含有维生素Ｃ、Ｂ１、Ｂ２、ＰＰ等，并含有丰富的微量元素铜、铁、锌、锰等，特别是含有半金属元素硒，营养丰富，具有很高的开发价值。

hemical Comporition of Betula (pendula) Sap collected in spring at the Buerjin flatlands tree farm are as follow: dry mater 1. 36-1. 42%,pH 5. 69-6. 44,nitrogen content 4. 5-9. 5mg/100ml,anino-acid content 20-30ml/100ml, sacharide content 1. 1-1.4% (majar fructose and glucose), organic acid content 25-55mg/100ml, vitamin C, B1, B2,PP and abundant tracelement Cu, Fe, An, Mn,and especially contain semimetal element Se. Itis of great nutritive value and tile natural resources is a valuble to exploit.