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中国农学通报 ›› 2019, Vol. 35 ›› Issue (22): 19-24.doi: 10.11924/j.issn.1000-6850.casb19030051

所属专题: 油料作物 园艺

• 农学 农业基础科学 • 上一篇    下一篇

油菜钾肥不同用量的肥效研究

曾洪玉1, 毛 伟2, 莫 渟1, 唐宝国1, 姚开文1   

  1. 1.扬州市江都区农业技术推广中心;2.扬州市耕地质量保护站
  • 收稿日期:2019-03-14 修回日期:2019-04-26 接受日期:2019-05-19 出版日期:2019-08-13 发布日期:2019-08-13
  • 通讯作者: 曾洪玉
  • 基金资助:
    省级农业生态保护与资源利用专项资金“耕地质量保护与提升项目”(扬财农[2018]48 号)。

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

摘要: 在适宜的氮磷硼肥配施基础上,连续3年进行了油菜钾肥不同用量试验,对油菜产量结构、籽产量、经济效益、钾肥利用率及土壤养分含量进行分析。结果表明,在氮磷硼肥配施下增施钾肥可促进油菜生长发育,对单株角果数、每角粒数和千粒重具有显著提高,施钾90kg/hm2时产量和效益最高,增产26%,产投比达4.73。增施钾肥对油菜肥利用率具有显著影响,钾肥表观利用率和钾肥偏生产力随着钾肥用量的增加而下降,钾肥生理利用率随着钾肥用量的增加而提高,钾肥农学利用率随钾肥用量的增加先升后降,变幅分别为30.1-66.84%、8.95-20.09 kg/kg、3.97-6.59 kg/kg、21.02-55.3kg/kg。增施钾肥可明显提土壤速效钾含量,对土壤全氮、有机质有效磷含量也有一定的促进作用。综合上述结果本试验条件下油菜生产中钾肥适用量为90 kg /hm2

关键词: 螯合剂, 螯合剂, 铀, 向日葵, 积累特征

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.