Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2019, Vol. 35 ›› Issue (22): 19-24.doi: 10.11924/j.issn.1000-6850.casb19030051

Special Issue: 油料作物 园艺

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Fertilizer Efficiency of Different Potash Fertilizer Amounts in Rapeseed Production

  

  • Received:2019-03-14 Revised:2019-04-26 Accepted:2019-05-19 Online:2019-08-13 Published:2019-08-13

Abstract: Based on the suitable application of nitrogen, phosphorus and boron fertilizer,Different amounts of potash fertilizer were tested for 3 consecutive years, and the yield structure, seed yield, economic benefit, utilization rate of potash fertilizer and soil nutrient content of rape were analyzed. The results showed that potassium fertilizer could promote the growth and development of rapeseed under the combined application of nitrogen, phosphorus and boron fertilizer, and significantly increased the number of kernels per plant, kernels per kernels and 1000-grain weight. The yield and benefit were the highest when potassium fertilizer was applied at 90kg/hm2, with an increase of 26% and a yield to investment ratio of 4.73. Increasing k fertilizer had a significant effect on the utilization rate of rapeseed.The apparent utilization rate and partial productivity of potash fertilizer decrease with the increase of potash fertilizer consumption, The physiological utilization rate of potassium fertilizer increases with the increase of potassium fertilizer dosage and the agronomic utilization rate of potash fertilizer increased first and then decreased with the increase of potash fertilizer consumption. The amplification ranges are respectively 30.1-66.84%, 8.95-20.09 kg/kg, 3.97-6.59 kg/kg and 21.02-55.3kg/kg.The content of available potassium in soil could be improved obviously and the contents of total nitrogen and available phosphorus in soil were also promoted. by adding k fertilizer.Based on the above results, the applied amount of potassium fertilizer in rapeseed production was 90 kg /hm2.