Grass yield, nutrient content and ruminal degradability of Hemarthria compressa with different agronomic measures

To investigate the impact of planting density, base fertilizer and top dressing on yield and in situ digestibility of Hemarthria compressa, an orthogonal experimental design L9（34）was used to study the grass yield, screenning the optimal combination, and determine the chemical composition and degradability in the rumen of goat. The results showed that under appropriate irrigation and management conditions, planting density of 40 cm×30 cm, manure 54 kg·18 m-2 + compound fertilizer 2.7 kg·18 m-2 base fertilizer, manure 18 kg·18 m-2+ urea 0.16 kg·18 m-2after each mowing dressing, the annual grass yield is the highest, reaching 129.47 t·ha-1. Nutrients of grass harvested by three cuttings were analyed. The CP, NDF and ADF of the fist cutting grass were 12.04%, 62.95% and 48.42%, respectively. The CP content of the first cutting was higher than that of the second cutting (P>0.05) , and that of the third cutting(20.04%, P0.05), and that of the third cutting(7.66%, P0.05), and that of the third cutting (6.18%, P0.05) and the third cutting; the first cutting ED values of OM was 45.10%, higher than that of the second cutting (P>0.05)and that of the third cutting (P>0.05). Thus, the nutrition and ruminal degradation rate of the first cutting H. compressa are better than the other cuttings, it can be used in goat feed.