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Of the Olympic jade 5102 5 State trial silage corn hybrids in different regions , different density under the conditions of the biological yield and quality under different density conditions studied . The study shows that : 1) different varieties , biological yield , neutral detergent fiber content (NDF%) and acid detergent fiber content (ADF%) exist significant differences between the crude protein content was no significant difference . Biological yield , Austria jade 5102 , in North 410 and Yayu no significant differences, but very significantly higher than the ND108 and Liao 625 ; the ND108 and Liao 625 quality nutritional quality , in the North 410 quality better , Austrian jade the 5102 quality , Yayu quality . 2) different locations a great influence on the biological production of silage corn hybrids . 3 ) different density biomass and neutral detergent fiber content greater impact , no significant effect of acid detergent fiber content . Higher planting density can obtain higher biomass yield , increased neutral detergent fiber content , the decline in quality . 4) in the area of bio- yield varieties and locations exist interaction ; variety and density exists only in Tongzhou interaction ; density and location without interaction . Neutral detergent fiber content , variety and density of interaction ; acid detergent fiber content , variety and density without interaction . 5 ) a comprehensive analysis of the tested varieties under different environmental conditions , this study suggests that , in the North 410 high yield , adaptability and better quality , suitable for large scale in the Beijing area , suitable for planting density of 67,500 / ha .
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