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Effects of Biogas Slurry and Chemical Fertilizer Application on N and P Uptake and Distribution and Yield of Peanut
Pages: 332-337
Year: Issue:  2
Journal: Rural Eco-Environment

Keyword:  biogas slurrychemical fertilizeryieldbiomass accumulationNP accumulationfertilizer recovery rate;
Abstract: Biogas slurry( BS),derived from pig dung and urine,was applied in a upland field of red soil in Yujiang of Jiangxi in a field experiment to explore effects of BS on yield,biomass and N,P accumulation at each growth stage,as well as fertilizer recovery rate of peanut. All the treatments,except CK,were the same in total N,P2O5 and K2O input( 120- 90- 135 kg·hm- 2). Results show that the peanut responded significantly in yield to combined application of BS and chemical fertilizer( CF),regardless of rate,with an increment of 44. 50%- 55. 70% and 10. 80%- 19. 40% as compared to CK and Treatment NPK,respectively. And Treatment BS30 was the highest in yield,reaching 3 588 kg·hm- 2.Correlation analysis reveals that the relationship between yield( y) and BS input( x) fitted the equation of y =- 1. 136 5x2+ 59. 112 x + 2 988. 3( R2= 0. 98,P < 0. 01). Treatment BS30 was 7. 29%- 56. 69%,11. 24%- 100. 44% and 9. 33%- 62. 17% higher in plant biomass accumulation,16. 58%- 77. 53%,4. 99%- 113. 74% and 1. 81%- 58. 58% higher in plant N accumulation and 4. 99%- 113. 74%,3. 06%- 127. 18% and 12. 56%- 62. 17%,higher in plant P accumulation than all the other treatments at the flowering,pod-bearing and harvesting stages,respectively. Besides,Treatment BS30 was 3. 27%- 23. 89% and 2. 72%- 19. 34%,too,in ratio of total N and total P in grains to total biomass N and P. Obviously,when biogas slurry is applied at 30% of the total N input,the crop will take up more readily available N and P from the soil at the flowering,pod-bearing and harvesting stages,while transporting more plant-absorbed N and P to grains. So the practice will significantly increase yield of the peanut crop and N and P recovery rates of the plants at various growth stages. It is,therefore,held that the practice is worth popularizing in red soil areas for peanut production.
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