Effects Of Different Fertilizer Levels In Big Flarre Period On Yield And Nutritive Quality Of Silage Maize

The trial used Silage maize variety Zhongbei 410 and the split-split plot design to study the effects of different fertilizer levels in big flare period on grass yield and nutritive quality. The relation between hay yield and conventional nutrient content and yield were analized by computer, according to the data. The follpwing conclusions were thus obtained.1 By knowing the relative materiality of Various factors on the yield and quality:the order of various factors on the impact of fresh grass yield,dry matter yield,crude ash yield,NEL content:phosphorus fertilizer>nitrogen fertilizer>potassic fertilizer;various factors on the impact of crude protein content, neutral detergent fiber content,crude ash content:potassic fertilizer>nitrogen fertilizer>phosphorus fertilizer;various factors on the impact of crude protein yield,neutral detergent fiber yield,crude fat content, NFE yield,NEL accumulation:potassic fertilizer>phosphorus fertilizer>nitrogen fertilizer;various factors on the impact of acid detergent fiber content:nitrogen fertilizer>potassic fertilizer>phosphorus fertilizer;various factors on the impact of acid detergent fiber yield and RFV:nitrogen fertilizer>phosphorus fertilizer>potassic fertilizer;various factors on the impact of crude fat yield: potassic fertilizer>nitrogen fertilizer;various factors on the impact of NFE content:phosphorus fertilizer>potassic fertilizer>nitrogen fertilizer.2 Analysis of single factor indicate:nitrogen fertilizer,phosphorus fertilizer,potassic fertilizer have a notable impact on the content of crude protein,neutral detergent fiber,acid detergent fiber,crude ash,NFE,NEL and the yield of fress grass,dry matter,crude protein,neutral detergent fiber,crude ash, NFE,NEL and RFV.3 Analysis of interaction impact indicate:the interactions of nitrogen fertilizer and phosphorus fertilizer,nitrogen fertilizer and potassic fertilizer,phosphorus fertilizer and potassic fertilizer have notable impacts on the content of crude protein,acid detergent fiber and the yield of acid detergent fiber;the interactions of nitrogen fertilizer and phosphorus fertilizer, nitrogen fertilizer and potassic fertilizer have notable impacts on the content of crude ash and NEL;the interactions of nitrogen fertilizer and potassic fertilizer,phosphorus fertilizer and potassic fertilizer have notable impacts on the content of crude fat,and the yield of fress grass,crude ash,and NEL accumulation;the interaction of nitrogen fertilizer and potassic fertilizer have notable impacts on NFE content and yield,and RFV; the interaction of phosphorus fertilizer and potassic fertilizer have a notable impact on NDF yield.4 The best measure which can get high yield and quality was N 138 kg/hm~2,P 54 kg/hm~2,K 27 kg/hm~2 in big flare period.