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在浙江中部发育于第四纪红土母质上的红壤性水稻土上设置田间试验 .提出当地油菜定氮公式 :N需 =0 0 7( y -1 1x) /E肥 .式中 ,y—足肥丰产下产量 ;x—无氮情况下产量 ;y和x之间可用y =67 2 2 58+1 2 1 98x表达 ;0 0 7是生产 1kg油菜籽 (含秸秆 )的需N量 (kg) ;E肥 为化肥利用率 ,它与x之间可用E肥 =4 9 2 3 6-0 2 3 53x表达 .此外明确在化肥和猪厩肥一起施用中 ,猪厩肥中N素利用折算率约为化肥N的一半左右 .
A field experiment was conducted on red soil paddy soil developed on Quaternary red soil parent material in the middle part of Zhejiang Province.The nitrogen fixation formula of local rapeseed was proposed: N = 0 0 7 (y -1 1x) / E fertilizer, where y- Yield under no-nitrogen condition; y and x can be expressed by y = 67 2 2 58 + 1 2 1 98x; 0 0 7 is the amount of nitrogen required to produce 1 kg of rapeseed (including straw) ); E fertilizer for fertilizer utilization, it can be used between E x = 4923 6-0 2 3 53x expression.In addition it is clear in the fertilizers and pig manure together with the use of pig manure N conversion rate of about About half of the fertilizer N.