Effects Of Nitrogenous Fertilizer On Guimu-1 Hybrid Pennisetum Urpureum Production Characteristics And Nutrition

The objective of this study is to show the effects of appliednitrogenous fertilizer on Guimu—1 Hybrid Pennisetum Urpureum agronomiccharacters, the photosynthesis characteristic, the grass quantity andquality, and the economic efficiency .The experiment uses the completelyrandomized block design, According to different nitrogenous fertilizerafter each time mow, it divides into 7 treatments, respectively is: A1(executes urea 150 kg/hm~2), A2 (executes urea 300 kg/hm~2), A3 (executesurea 450 kg/hm~2), B1 (executes ammonium carbonate 411.3 kg/hm~2), B2(executes ammonium carbonate 821.4 kg/hm~2), B3 (executes ammoniumcarbonate 1231.65 kg/hm~2), NO (CK). The result shows that:1. All experimental groups have increased Guimu—1 Hybrid Pennisetum Urpureum plant height, leaves stretch and width, and the minute tiller number. A2 and B2 are more advantageous than others to increase Guimu -1 Hybrid Pennisetum Urpureum agronomic characters.2. Experimental groups have fresh grass and hay yield increased compared to CK, B2 fresh grass and hay yield is the highest, respectively is 293. 84 t/hm~2 and 40. 52 t/hm~2, A2 fresh grass and hay yield is next, B2 is remarkable (P < 0.05) to be higher than B1, A1 and NO.3. Ammonium carbonate is more advantageous in enhancing chlorophyll content and net photosynthesis rate of Guimu—1 Hybrid Pennisetum Urpureum function leaf than urea . With nitrogenous fertilizer increasing, chlorophyll content and net photosynthesis rate at first rise, then drop.4. Nitrogenous fertilizer enhances Guimu—1 Hybrid Pennisetum Urpureum crude protein content and output, soluble sugar content and output, meanwhile can enhance the hydrolysis amino acid and the total essential amino acids content, but reduces neutral detergent fiber (NDF) and the acid detergent fiber(ADF) content; It is not big influence to the phosphorus content and output. Generally speaking, the ammonium carbonate effect surpasses slightly the urea effect, A2 and B2 is more advantageous to the improvement of forage grass quality than others.5. Dry matter degradation (DMD) and organic matter degradation (OMD) in goat in vitro of Guimu—1 Hybrid Pennisetum Urpureum After different nitrogenous fertilizer treatments are different, All experimental groups enhance the degradation of Guimu—1 Hybrid Pennisetum Urpureum except the high nitrogenous fertilizer treatments(A3 and B3), B2 degradation rate is highest, DMD and OMD respectively is 60.8% and 67.2%, B1, B2 and A1 degradation rate is remarkable (P<0.05) to be higher than A3 and B3.6. The low nitrogen and the middle nitrogen level can enhance Guimu -1 Hybrid Pennisetum Urpureum economic efficiency, but the high nitrogen...