| Pea tree(Caragana Korshinskii Kom), named peashrub, big pea tree or hairy pea tree, is leguminous perennial deciduous arboret. Grazer like to intake its delicate branches and it is called "link forage" of grazer in winter and spring. When delicate branch of pea tree of three years old were clipped from early flowering to late flowering stage(may) three years, dried, separated and grinned, 375kg peashrub leaf meal(PLM) can be acquired per mu. CP content of PLM is 24.7%,and CF content is only 19.54%, which is complete in amino acids, rich in minerals and very rich in carotins. That is a kind of high quality protein feed resource. On this paper, DE of PLM to goat, protein digestibility and digestable protein content were determined, and rumen degradation characteristics of dry matter and protein in alfalfa meal(AM) and PLM, and the feeding result of PLM to lamb were studied. Experiment 1: Endogenous indicator–acid-insolubling ash(AIA) method was used to measure DE, digestibility of protein and digestable protein content of PLM to goat. The results showed that: DE, digestibility of protein and digestable protein content of PLM to goat is 10.45MJ/kg, 81.20% and 178.8g/kg, respectively. No reveres reaction was found in experiment.Experimemt 2: The nylon bag technique was used to study degradability of dry matter and protein and degrading characteristics of AM and PLM in the rumen of three goats by fixing perpetual rumen cannulae, and the degradability difference between the two roughages was analyzed. The results showed that: different feed had different degradability of dry matter and protein in different incubition times, dry matter and protein disappearance of PLM were higher than that of AM at all incubition times, and there were significant differences of dry matter disappearance between the two roughages at 4hr, 8hr and 72hr(P<0.05), and protein disappearance at 4hr, 48hr and 72hr(P<0.05); degradability of dry matter of PLM and AM was 61.12% and 57.89%, respectively, and 80.27% and 72.67% for protein, respectively; degrading characteristics of dry matter and protein in the two forages were different also in different incubition times, the soluble fractions (a) of dry matter and protein in PLM were all higher than that of AM, while the insoluble potentially digestionable fractions(b) and the fractional rate of degradation(c) were all lower. protein degradation curve of PLM changes greatly but dry matter degradation curve gradually.Experiment 3: Twenty seven lambs of six months old, with nearly weight from same variety, were divided into three groups randomly. Every group had three replicates. Experimental ration was consisted of concentrate, forage meal and wheat straw. With the same concentrate/roughage ratio and at same nutrient level of the ration, the lambs were fed AM(group1), AM and PLM(group2), and PLM(group3),respectively to compare the feeding results among the three groups after sixty days' dry-lot fattening. The results showed that: ①Thirty days' live weight gain(LWG) of group1, group2 and group3 was 4.7kg±0.5, 5.19kg±0.27 and 4.4 kg±0.17, respectively. The LWG of group2 was higher significantly than that of group3 (P<0.05), there were no significant differences between any other two groups; ② sixty days' LWG of three groups was 9.8 kg±0.43, 11.38 kg±0.46 and 10.92 kg±0.6, respectively. The LWG of group2 was higher significantly than that of group1 (P<0.05) and group3(P<0.05), there were no significant differences between group1 and group3; ③ concentrate consumption per kg gain of three groups was 3.68 kg±0.16, 3.17 kg±0.13 and 3.3 kg±0.18, respectively; forage meal consumption per kg gain of three groups was 2.75 kg±0.12, 2.11 kg±0.08 and 1.98 kg±0.11, respectively; wheat straw consumption per kg gain of three groups was 1.62 kg±1.22, 2.37 kg±0.09 and 2.75 kg±0.15, respectively. Wheat straw consumption was not different between group1 and group2, but concentrate and forage meal consumption of group2 were lower than that of group1(P<0.05), forage meal consumption of g...
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