• ISSN 1008-505X
  • CN 11-3996/S
杨俊刚, 倪小会, 徐凯, 许俊香, 曹兵, 刘宝存. 接触施用包膜控释肥对玉米产量、根系分布和土壤残留无机氮的影响[J]. 植物营养与肥料学报, 2010, 16(4): 924-930. DOI: 10.11674/zwyf.2010.0422
引用本文: 杨俊刚, 倪小会, 徐凯, 许俊香, 曹兵, 刘宝存. 接触施用包膜控释肥对玉米产量、根系分布和土壤残留无机氮的影响[J]. 植物营养与肥料学报, 2010, 16(4): 924-930. DOI: 10.11674/zwyf.2010.0422
YANG Jun-gang, NI Xiao-hui, XU Kai, XU Jun-xiang, CAO Bing, LIU Bao-cun. Effects of co-situs application of polymer-coated fertilizers on grain yield, root distribution and soil residual Nmin in summer maize[J]. Journal of Plant Nutrition and Fertilizers, 2010, 16(4): 924-930. DOI: 10.11674/zwyf.2010.0422
Citation: YANG Jun-gang, NI Xiao-hui, XU Kai, XU Jun-xiang, CAO Bing, LIU Bao-cun. Effects of co-situs application of polymer-coated fertilizers on grain yield, root distribution and soil residual Nmin in summer maize[J]. Journal of Plant Nutrition and Fertilizers, 2010, 16(4): 924-930. DOI: 10.11674/zwyf.2010.0422

接触施用包膜控释肥对玉米产量、根系分布和土壤残留无机氮的影响

Effects of co-situs application of polymer-coated fertilizers on grain yield, root distribution and soil residual Nmin in summer maize

  • 摘要: 采用田间小区试验,研究了习惯施肥与接触施用包膜控释肥料对夏玉米生长、产量、根系分布和土壤无机氮残留的影响。结果表明,接触施用包膜控释肥料没有抑制玉米的出苗和幼苗生长; 减氮1/3的控释肥处理(N 120 kg/hm2)与习惯施肥处理(N 180 kg/hm2)的玉米产量没有差异。在0—30 cm土层,与对照和习惯施肥处理相比,接触施用控释肥增加了距茎基部0—10 cm区域内玉米根长密度的分布,占总根长的59%~64%; 玉米收获后,减量控释肥处理土壤剖面各个土层Nmin含量与对照相比无显著增加,习惯施肥和全量控释肥处理(N 180 kg/hm2)在60—90、90—120 cm土层的Nmin累积显著高于对照。综合考虑玉米生长、产量以及根系分布和氮素淋失风险,本试验条件下,接触施用控释肥N 120 kg/hm2是夏玉米季较为理想的选择。

     

    Abstract: A field experiment was conducted to study effects of co-situs application of polymer-coated fertilizers(PCF)on the summer maize grain yield, root distribution, and the Nmin residual in soil profile. Before the maize sowing, the polymer-coated fertilizers were applied in the top-soil with a 4-8 cm depth, which just under the seed point. The amount of applied coated-fertilizers was N 180 kg/ha for the treatment PCFN1, and N 120 kg/ha for the treatment PCFN2. A conventional fertilizer treatment that received N 180 kg/ha and a CK treatment that received no N were included. The main results were as follows: 1)No negative impacts on seed generation and seedling growth occurred from the treatments with single co-situs application of coated-fertilizers; 2)The maize grain yields from N fertilized treatments were significantly increased, which were 9.61 to 10.4 t/ha higher than the CK treatment(8.71 t/ha). The yield from the PCFN2 treatment was same to that from conventional fertilizer treatment; 3)In the plough layers(0-30 cm), root length density in the area of 0 to 10 cm near the stem from PCFN1 or PCFN2 treatments accounted for 59%-64% of the total root, which were higher than those from conventional fertilizer or CK treatments; 4)There was no significant increase of accumulation of residual Nmin in the PCFN2 treatment compared to CK treatment; Nmin in the 60-90 and 90-120 cm layers from the conventional fertilizer or PCFN1 treatments were significantly higher than that of CK treatment after maize harvest. Taking maize yield, root distribution and N leach risk into consideration, the co-situs application of polymer-coated fertilizers with N 120 kg/ha was the best for summer maize in this experimental area.

     

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