Effect Of Fertilization On Alfalfa Of High Yield And High Quality

The purpose of this study is to determine the fertilization parameters and explore the nutrient ratio influence on the production and quality of alfalfa through the fertilization experiment of different varieties in the key field scientific observation experiment station of forage resource at the Ministry of Agriculture, in Sha er qin, Huhhot suburb. The main results are as follows:1. Each fertilizer processing significantly improved the grass yield of alfalfa varieties, and the increase of yields from high to low in turn is:NPKï¹¥PKï¹¥NK,NPï¹¥K,P,Nï¹¥organic fertilizerï¹¥CK.2. Fertilization can significantly improve the plant body protein content of alfalfa, every processing content from high to low in turn is:NPKï¹¥NPï¹¥NKï¹¥PKï¹¥Nï¹¥Pï¹¥Kï¹¥organic fertilizerï¹¥CK.3. Each fertilizer processing significantly improved the nitrogen,phosphorus and potassium content of plant body, Various processing of each nutrient content from high to low in turn is:N:NPKï¹¥NPï¹¥NKï¹¥PKï¹¥Nï¹¥Pï¹¥Kï¹¥organic fertilizerï¹¥CK;P:NPKï¹¥PK,NK,NPï¹¥Pï¹¥Kï¹¥N,organic fertilizerï¹¥CK;K:NPKï¹¥PKï¹¥NKï¹¥NPï¹¥Kï¹¥Pï¹¥Nï¹¥organic fertilizerï¹¥CK.4. Each fertilizer processing has different extent influence on soil pH value and available nutrients, which positively affected the fertility of the soil nutrient overall.Soil pH value of P processing and NPK processing had the greatest reduction,reaching around 0.35 and 0.37;By treatment of N,P,NP,NK,organic fertilizer,content of soil organic matter,have a little drop,which by treatment of K,PK,NPK rose;Soil available N content of each treatment have decreased,the greatest reduction is the CK and PK processing,the smallest reduction is the NPK processing;Soil available P content was substantially increased for all treatments with phosphate fertilizer application,and which of CK,N,K,NK,organic fertilizer than background value before experiment all little scope droped;Soil available K content by treatment of K were significantly higher than by treatment of no K,Soil available K content of each K processing from high to low in turn is: Kï¹¥NKï¹¥PKï¹¥NPK.5. The test of four selected alfalfa varieties have good adaptability to the saline and alkaline soils,the yield,the plant protein and nutrient content of the YL-604 are higher than others,so which is the better variety for this area for planting and improving the saline-alkali soils.6. The experience formula which determined the yield of alfalfa in this region is:Y=-3096+1.91557X (X:The blank yield/Kg/hm²;Y:The target yield/Kg/hm²).7. The target yield of YL-604 is 8248Kg/hm²,the reasonable dosage of the N,P₂O₅,K₂O are 115Kg/hm²,114Kg/hm²,158Kg/hm²;The target yield of YL-902 is 7561Kg/hm²,the reasonable dosage of the N,P₂O₅,K₂O are 116Kg/hm²,115Kg/hm²,159Kg/hm²;The target yield of YL-80 is 7966Kg/hm²,the reasonable dosage of the N,P₂O₅,K₂O are 120Kg/hm²,118Kg/hm²,64Kg/hm²;The target yield of YL-9 is 7953Kg/hm²,the reasonable dosage of the N,P₂O₅,K₂O are 112Kg/hm²,112Kg/hm²,155Kg/hm².