Through nutrient deficiency experiments and comparative experiments at different levels of fertilizer application,the absorption and utilization characteristics of six elements,including N,P2 O5,K2 O,B,Mn and Fe,were studied in Brassica oleracea'Lvfeng 2',providing a basis for increasing fertilizer application efficiency and scientific fertilization in heading cabbage.Through nutrient deficiency experiments,it was found that when there was a high content of available phosphorus and potassium in the soil,applying phosphorus or potassium fertilizer a-gain could not increase the yield of cabbage,but instead would reduce it;applying nitrogen fertilizer could increase the yield of cabbage;from the perspective of different fertilization levels,the more fertilizer applied,the higher the yield of cabbage,but the magnitude of yield increase gradually decreased.The average ratio of N,P,and K nutrient absorption in the'Lvfeng 2'cabbage was13.39∶8.00∶29.86,and the average ratio of B,Mn,and Fe nutrient absorption was 52.28∶83.36∶158.01.When the target yield was 70 392 kg/hm2,the application rates of N,P2 O5,and K2 O reached 91.03,55.67 and 210.24 kg/hm2,and the application rates of B,Mn,and Fe reached 57.44,85.58 and 171.53 g/hm2,the nutrient balance in the soil during the season can be maintained.The agricultural efficiency of N P K fertilizer was 130.33,11.10 and 6.44 kg/kg,respectively.
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