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Chinese Agricultural Science Bulletin ›› 2016, Vol. 32 ›› Issue (29): 91-96.doi: 10.11924/j.issn.1000-6850.casb16030110

Special Issue: 油料作物

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Effects of Nitrogen Application Rate on Peanut Yield and Quality and Nitrogen Utilization Efficiency

  

  • Received:2016-03-15 Revised:2016-04-08 Accepted:2016-04-25 Online:2016-10-12 Published:2016-10-12

Abstract: In order to achieve high yield and good quality of peanut production and high utilization efficiency of nitrogen in Shajiang black soil area of southern Henan, the effects of nitrogen application rate on peanut yield and quality and nitrogen utilization efficiency were studied by field experiments with split- plot randomized block design. The results showed that pods yield increased with the increase of nitrogen application rate for all peanut varieties. The highest pods yield appeared under nitrogen application rate of 180 kg/hm2 for‘Yuhua 23’,‘Yuanza 9102’and‘Yuanza 6’, whose pods yield increased by 30.45%, 25.96% and 21.46% in comparing with that of CK respectively. Peanut protein and crude fat content of‘Yuhua 23’ exhibited a parabola trend with the increase of nitrogen application rate. However, the protein content increased and the crude fat content decreased in‘Yuanza 6’and‘Yuanza 9102’. Nitrogen application could reduce methionine content in peanut kernel in‘Yuanza 6’and‘Yuanza 9102’, and increase other protein components content in other varieties.‘Yuanza 9102’had the highest nitrogen utilization efficiency of 36.7%. ‘Yuhua 23’had the highest nitrogen agronomy efficiency and nitrogen partial productivity of 6.9 kg/kg and 36.9 kg/kg, respectively. Under the experimental condition, the appropriate nitrogen application rate for ‘Yuhua 23’and‘Yuanza 6’was 180 kg/hm2, and peanut yield was 5330.36 and 5002.98 kg/hm2, respectively. The appropriate nitrogen application rate for‘Yuanza 9102’was 135 kg/hm2 with peanut yield of 5199.40 kg/hm2.

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