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Study on Characteristics and Ulyrastructure of Hair Coat in Tianzhu White Yak

Author: NiuChunE
Tutor: ZhangLiPing
School: Gansu Agricultural University
Course: Cultivation
Keywords: Tianzhu white yak Coat performance Ultrastructure
CLC: S823
Type: Master's thesis
Year: 2007
Downloads: 16
Quote: 0
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Abstract


Plush fiber spinnability and the choice of the process is determined by their different physical and chemical properties and unique organizational structure. Therefore, on the days of white yak coat physical characteristics, chemical composition and ultrastructure of a comprehensive system to study, not only on the rational use of Tianzhu white yak plush resources makes sense, and the transformation of China's wool textile industry, select Tianzhu the white yak plush textile performance and the process is very important. Tianzhu White yak breeding experiments the field grasping hi show Longtan core group 1-7 years old white yak each 20 randomly selected, its shares back, the five parts of the shoulder, side, belly hair growth year for the test sample, following experimental studies: Tianzhu white yak hair morphology and fiber type analysis; Tianzhu white yak coat fiber physical properties and chemical composition of the study; Tianzhu white yak hair microstructure research; collected adult yak growth year's dress hair and tail of growth for two years Moyamoya four components each with 4 copies of the 30-year-old female hair, was the performance of research. The results show that: (1) different age Tianzhu white yak of coat fiber physical characteristics: the various types of fiber content of different age difference was very significant (P <0.01), and the the age growth fluff and two types of hair content decreased shag content gradually rise: the different types of fiber fineness are the growth of age increases, the length, strength, elongation, while increases in the growth of age, at 3-4 years of age growth slowed or decreased slightly, 7 years old decreased significantly. Different age fluff fine degree, length and elongation difference extremely significant (P <0.01), strong differences significant significantly (P> 0.05); two types of capillary degree, strength, elongation difference extremely significant significantly (P <0.01) difference in the length. significant (P> 0.05); the coarse capillary degrees, strong differences pole significant (P <0.01), elongation significant difference (P <0.05), the length difference is not significant (P> 0.05). (2) Tianzhu white yak in different parts of the body hair fiber physical characteristics: different parts of the various types of fiber content very significant difference (P <0.01). Side fluff content most cashmere fiber fineness, the minimum length of single fiber breaking strength and elongation at break, all kinds of fiber, especially fiber quality fluff. Back of each type of fiber stubby and poor quality. Abdomen coarse the (skirt hair) the most abundant and good quality. Shoulder cashmere fiber is fine, but the length is significantly shorter. Between the various parts of the villi fine degree, differences in elongation extremely significant (P <0.01), strength and length differences are not significant with (P> 0.05); two types of capillary-degree difference significant significantly (P <0.05), length, strength, elongation rate highly significant difference (P <0.01); the coarse capillary-degree difference was not significant (P> 0.05), length, strength and elongation difference was significant (P <0.01). (3) of different ages, different types of fiber, including dress hair and tail hair by 18 amino acids cystine and sulfur content were higher, and the finer the fibers, the higher the sulfur content. (4) the microscopic structure of the different types of fibers are also differences. (5) Tianzhu white yak skirt wool and hair of the physical properties and chemical composition close to the microscopic structure is relatively similar.

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CLC: > Agricultural Sciences > Livestock, animal medicine,hunting,silkworm,bee > Livestock > Cow
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