氮肥用量对直播油菜产量及氮素吸收利用的影响
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作者单位:

(1.安徽农业大学资源与环境学院,安徽 合肥 230036;2.安徽省农业科学院土壤肥料研究所,安徽 合肥 230031;3.养分循环与资源环境安徽省重点实验室,安徽 合肥 230031;4.舒城县农业科学研究所,安徽 舒城 231300)

作者简介:

郭子琪(1993-),女,山西晋城人,硕士研究生,主要从事土壤培肥措施相关方向研究。E-mail: guoziqi0913@163.com。

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基金项目:

基金项目:国家重点研发计划(2018YFD0200900);安徽省农业科学院团队项目(2019YL044);公益性行业科研专项(201503122);安徽省科技重大专项(17030701055);安徽省国际科技合作计划项目(1604b0602022)。


Effect of nitrogen application rate on yield and nitrogen uptake and utilization of direct seeding rape
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Affiliation:

(1.College of Resources and Environment,Anhui Agricultural University,HefeiAnhui230036;2.Institute of Soil andFertilizer,Anhui Academy of AgriculturalSciences,Hefei Anhui230031;3.KeyLaboratory of Nutrient Cycling and Resource Environment,Anhui Province,Hefei Anhui230031;4.Shucheng CountyAgricultural Science ResearchInstitute,Shucheng Anhui231300)

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    摘要:

    为了明确安徽省江淮地区直播油菜氮肥的适宜用量,在安徽省江淮地区布置不同氮肥用量对直播油菜产量、氮素累积量、经济效益及氮肥利用率影响的田间试验。结果表明,施用氮肥显著提高了油菜产量和氮素累积量。施氮量高于 240 kg/hm2后,油菜籽粒产量和氮素累积量的增加趋于平缓。氮肥用量为 240 kg/hm2时获得最高经济效益 10 026元/hm2。氮肥用量为 180 kg/hm2时,油菜氮肥表观利用率达到最高(43.78%),氮肥施用量超过 240 kg/hm2,氮收获指数和肥料利用率出现下降。施氮量相同的情况下,分次施肥比起一次性施肥更有利于提高油菜产量。综合油菜的产量、肥料利用率和经济效益,安徽省江淮地区直播冬油菜施氮量在 180~ 240 kg/hm2能较好地协调油菜高产和氮肥合理利用的统一。

    Abstract:

    In order to clarify the appropriate amount of nitrogen fertilizer for direct seeded rapeseed in Jianghuai area of AnhuiProvince,field experiments were set up with different amount of nitrogen fertilizer applied to study the effects of nitrogenapplication on the rape yield,nitrogen accumulation,economic benefit and nitrogen use efficiency.The results showedthat the yield and nitrogen accumulation of rapeseed increased significantly by the application of nitrogenfertilizer.When the amount of nitrogen application was higher than 240 kg/hm2,the rapeseed yield and nitrogen accumulation kept the sameyet.The highest economic benefit was 10 026 yuan/hm2 when the amount of nitrogen fertilizer was 240 kg/hm2.When the nitrogen fertilizer was 180 kg/hm2,the apparent utilization rate of rapeseed nitrogen fertilizer reached43.78%.When the application rate of nitrogen fertilizer was higher than 240 kg/hm2,the nitrogen harvest index and fertilizer utilization rate wereboth decreased.Under the same amount of nitrogenfertilizer,the rapeyield,nitrogen accumulation and nitrogen utilizationrate with urea applied separately were higher than that with urea applied at one time.Considering theyield,nutrientaccumulation,fertilizer utilization rate and economic benefit ofrapeseed,the optimal fertilizer application of direct seededrapeseed is 180~ 240 kg/hm2in the Jianghuai region of AnhuiProvince.

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郭子琪,王慧,韩上,李敏,雷之萌,张军,程文龙,卜容燕,武际,朱林.氮肥用量对直播油菜产量及氮素吸收利用的影响[J].中国土壤与肥料,2020,(5):40-44.

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  • 收稿日期:2019-09-03
  • 最后修改日期:
  • 录用日期:2019-11-02
  • 在线发布日期: 2020-11-06