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頁籤選單縮合
題名 | 放牧飼養密度對雌土雞生長性能、土壤性質及植生覆蓋之影響=Effects of Stocking Densities on Growth Performance of Native Chicken, Soil Properties and Vegetation Covering |
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作者 | 劉曉龍; 謝昭賢; 黃祥吉; 陳添福; 洪哲明; 鄭裕信; 廖宗文; 郭猛德; | 書刊名 | 畜產研究 |
卷期 | 38:4 民94.12 |
頁次 | 頁227-236 |
分類號 | 437.714 |
關鍵詞 | 土雞; 飼養密度; 生長性能; 植生覆蓋率; Taiwan native chicken; Stocking density; Growth performance; Vegetation covering; |
語文 | 中文(Chinese) |
中文摘要 | 本試驗在一定面積下,放牧飼養不同密度之雌土雞,觀察放牧對雌土雞之生長性能、土壤理化性質及地表植生之影響,並找出適當飼養密度,以供農友放牧飼養土雞之參考。試驗前將雌土雞舍飼至5週齡;自第6週起,依六種不同飼養密度,逢機分配至各小區,二重複,共12小區,每小區面積為16.5 m2。飼養密度為0、2、4、6、8及10隻/3.3m m2 (2、2、4、6、8及10隻/坪),共使用雌土雞計300隻。放放調查期間為6週齡至20週齡。結果顯示平均每3.3 m2(1坪)飼養10雌土雞,其飼料效率及20週齡體重顯著較其他各試驗組差。存活率則以每坪飼養密度6隻者為最低,為91.7±2.3%,顯著地低於其他各組。羽毛損傷評估,各組均極少 羽現象。放牧試驗結束後地表植生覆蓋率以每坪飼養2隻雌土雞之10.8%為最佳,而無飼養雞之對照組為95.6%,其他各組植生覆蓋率低,地表裸露情形相當嚴重。放牧結束後,所做的土壤理化性質調查,以每坪飼養10隻者測出氮0.28%; 磷133 mg/kg;鋅22.3 mg/kg;導電度5.05 dS/m顯著較高。 |
英文摘要 | The purpose of this experiment was to determine the effect of stocking densities on growth performance of native chickens, physico-chemical properties of soil and vegetation covering. A total of 300 native chickens were raised in a poultry house till 5 weeks of age. From 6 weeks of age, female chickens were allotted into 12 blocks and six stocking density groups. Each block has 16.5 m2 area covered with 12.4 m2 pasture. The densities were 0, 2, 4, 6, 8 and 10 birds per 3.3 m2. each treatment had two replicates. Perch and shelter were provided during the experiment from 6 to 20 weeks of age. The results indicated that the 10 birds/3.3 m2 treatment had the poorest feed efficiency and body weight gains when compared with other other treatments (P<0.05). The feed efficiency and body weight gains for Pullet were 6.45±0.49 and 1487±167g in the 10 birds/3.3 m2 group, respectively. The survival rate was 91.7±2.3% in pullets in the 6 birds /3.3 m2 group which was the lowest among the treatments. There was no significant difference in feather score among treatemtns. At the end of the experiment, vegetation covering in 2 birds/3.3 m2 group was better than the other treatments. Regarding the physical and chemical properties of soil, 10 birds/3.3 m2 group had the highest N, P, Zn and electrical conductivity (EC), which were 0.28%, 133mg/kg, 22.3 mg/kg, and 5.05 dS/m in Pullet, respectily. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。