CAJ | 학술논문

采用二因素裂区试验，研究了种植密度和施氮对玉米×墨西哥大刍草杂种饲草产量和饲用价值的影响。结果表明，种植密度、施氮及其交互效应对玉米×墨西哥大刍草杂种饲草产量和饲用价值影响显著。低密度和高密度均降低了饲草产量，较高的施氮量提高饲草产量。饲草的粗蛋白含量、粗脂肪含量、可溶性糖含量、相对饲用价值随着种植密度的降低和施氮水平的升高而升高，酸性洗涤纤维和中性洗涤纤维含量则相反。5种营养成分产量均随密度和施氮量的增加分别呈“低-高-低”和逐步上升的变化趋势。说明在玉米×墨西哥大刍草杂种栽培过程中，可以通过调节种植密度和施氮量，充分利用密氮互作效应，提高饲草产量和饲用价值。在本试验条件下，玉米×墨西哥大刍草杂种种植密度在40000株/hm2的基础上施氮450 kg/hm2左右是饲草高产优质的合理组合。
채용이인소렬구시험，연구료충식밀도화시담대옥미×묵서가대추초잡충사초산량화사용개치적영향。결과표명，충식밀도、시담급기교호효응대옥미×묵서가대추초잡충사초산량화사용개치영향현저。저밀도화고밀도균강저료사초산량，교고적시담량제고사초산량。사초적조단백함량、조지방함량、가용성당함량、상대사용개치수착충식밀도적강저화시담수평적승고이승고，산성세조섬유화중성세조섬유함량칙상반。5충영양성분산량균수밀도화시담량적증가분별정“저-고-저”화축보상승적변화추세。설명재옥미×묵서가대추초잡충재배과정중，가이통과조절충식밀도화시담량，충분이용밀담호작효응，제고사초산량화사용개치。재본시험조건하，옥미×묵서가대추초잡충충식밀도재40000주/hm2적기출상시담450 kg/hm2좌우시사초고산우질적합리조합。
The effects of planting density and nitrogen application on the Z.mays ×Z.mexicana hybrid forage yield and feeding value traits were studied by the means of using a split plot experiment with two factors .The results show that effect of density ,nitrogen application and the interactions between them on the forage yield and feeding value traits were significant .The lowest and highest planting could decrease forage yield ,but high nitrogen applica-tion improve forage yield.The crude potein content,ether extract content,water soluble carbohydrate content ,rela-tive feeding value of the Z.mays ×Z.mexicana hybrid were all increased both with the decrease of planting density and the increase nitrogen application level , while acid detergent fiber and neutral detergent fiber content were de-creased .The crude potein , ether extract , water soluble carbohydrate , acid detergent fiber , neutral detergent fiber yields of the Z.mays ×Z.mexicana hybrid with the increase of planting density and nitrogen application which showed the change of "low-high-low"and rising gradually ,respectively .We can adjust planting density and nitrogen rate to take advantage of the interaction between them to improve Z.mays ×Z.mexicana hybrid forage yield and feeding value .In conclusion ,planting at 40 000 plants per hectare and applying 450 kg nitrogen per hectare were best management practices ,based on the results of this study .