Studies On The Relative Change Of Dietary Fiber In Sweet Orange [Citrus Sinesis(L.) Osbeck] Fruit In Different Habitats

This study Selects three different habitate in Sichuan province: the Southern subtropical dry hot and more sunshine of Jinsha River and Yalong River zone of Tongzilin(1098 meters above sea level) and Hong'ge town (1476 meters above sea level),Yanbian County;the Middle-subtropical wet hot and more sunshine region of Yile town and Anle state farm,Jiang'an County(420 meters above sea level);the north-middle-subtropical wet hot and less sunshine region,Pujiang(505 meters above sea level) and Mingshan(645 meters above sea level),applies two different orange varieties (Robertson Navel orange [Citrus sinesis(L.) Osbeck] and Valencia Orange [Citrus sinesis(L.) Osbeck] as testing materials, which is above 10 years old on tangerine[C, reticulata) rootstock. Samples were got in orientation and regular date, at the same timethe field ecology and biology periodical inspection were made.The dynamic of dietary fiber and the field ecology and biology were detected during the development of orange fruit .The changes of main texture indexes and the composition of cell wall were studies during fruit growth and maturation as well. 1. Dynamic of main texture factor of orange fruitThe water pectin increased with the devolpment of fruit;meawhile the HC1 soluble pectin decread in prophase and decreased in anaphase.The cellulose is the highest in the time of young fruit,then it's content decreased slowly, the cellulose content of Navel orange fruit is lower than Valencia orange fruit;Hemicellulose did not change a lot in during the time of young fruit and maturation,but in the whole devlopment phase,the dynamic change is significant,there are two maximums at 150 and 200 days after anthesis,while the content of Jiang'an decreased gradually;in the prophase,the lignin conten decreased and increased a bit in the anaphase,the lignin content in the maturation phase are lower than young fruit phase.;the content of NDF and ADF decreased as straight line in the whole devlopment phase.