Effects of Different Nitrogen and Phosphorus Application Rates on the Growth of Summer-sown Forage Oats
In order to explore the effect of different fertilizer rates on the production performance of forage oats in Longdong area,the early-maturing variety Bianfeng and the medium-maturing variety Menglong were selected as materials,and 6 nitrogen and phosphorus mixed fertilization amounts were set as 0(CK),75 kg/ha,150 kg/ha,225 kg/ha,300 kg/ha,and 375 kg/ha,respectively.The effect of different fertilizer amounts on the agronomic traits,forage yield and cold resistance of two summer-sowing oats were studied.The results showed that the emergence rate,plant height,tillering number,hay yield and cold resistance of forage oats were improved by different application rates when compared with the CK.The early-maturing variety Bianfeng and the medium-maturing variety Menglong both showed a better response to 300 kg/ha fertilizer application rate(N 91.50 kg/ha plus P2O5 63.00 kg/ha),which showed better emergence rate and higher tiller number,the content of soluble sugar and proline were increased significantly.The forage yield peaked under this treatment with fresh yields reaching 14 356.29 and 14 464.28 kg/ha,respectively,which was 71.7%and 93.5%higher than that of the CK,respectively,whereas the hay yields were 4 850.00 and 4 633.33 kg/ha,respectively,which were 74.3%and 82.9%higher than those of the CK,respectively.Therefore,in the case of summer sowing in Longdong area,nitrogen and phosphorus mixed with different fertilization rates had a significant effect on improving oat biomass and cold resistance.The early-maturing variety Bianfeng and the medium-maturing variety Menglong performed the best at 300 kg/ha(N 91.50 kg/ha plus P2O5 63.00 kg/ha).Therefore,N 91.50 kg/ha plus P2O5 63.00 kg/ha is the best fertilization mode for summer-sown forage oat in Longdong area.
Forage oatNitrogen and phosphorus fertilizationFertilization rateForage yieldBiomass yieldLongdong re-gion
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