辽西土壤养分供应能力与高粱施肥推荐

发布时间：2018-01-30 06:55

本文关键词： 土壤养分供应产量养分吸收养分利用率高粱　出处：《中国土壤与肥料》2016年06期 　论文类型：期刊论文

【摘要】：为探讨辽西褐土区土壤养分供应能力,2012年和2014年采用随机区组试验研究了不同施肥处理下土壤养分供应、高粱产量及养分吸收利用的变化。试验包括CK、NPK、PK、NK和NP 5个处理,3次重复。结果表明,该试验区土壤供氮、供磷、供钾能力分别为80.9%、88.5%、97.6%。土壤供氮、磷能力为"中",供钾能力为"高",氮素是该区高粱生产首要养分限制因子。2012年NPK较PK处理增产20.5%,与NK处理产量差异不显著,2014年NPK分别较PK和NK处理增产26.9%和20.3%,2年间NPK与NP处理产量差异不显著。NPK或NP配施可显著提高高粱产量。不同施肥措施对N、P、K的吸收量以NPK和NP处理较高。施氮肥可显著降低氮素收获指数,施磷肥和钾肥对磷素和钾素收获指数无显著影响。肥料农学效率以磷肥最高,氮肥居中。肥料利用率以氮肥最高,磷肥最低。综合不同施肥处理下的养分供应能力、高粱产量、养分吸收量和利用率可知,本地区高粱施肥应加强氮肥的合理投入,并注重磷肥的合理施用。
[Abstract]:In order to study the soil nutrient supply capacity of cinnamon soil in western Liaoning Province, a randomized block experiment was conducted in 2012 and 2014 to study the soil nutrient supply under different fertilization treatments. Changes of sorghum yield and nutrient uptake and utilization. The experiment included CK NPK PKNK and NP5 treatments. The results showed that the soil was supplied with nitrogen and phosphorus. The capacity of supplying potassium was 80.988. 5% and 97.66.The ability of supplying nitrogen and phosphorus was medium and the ability of supplying potassium was "high". Nitrogen was the main nutrient limiting factor in sorghum production in this area. In 2012, NPK increased 20. 5% compared with competition treatment, but there was no significant difference between NK treatment and NPK. In 2014, NPK increased by 26.9% and 20.3% respectively compared with competition and NK treatment. There was no significant difference in yield between NPK and NP in two years. NPK or NP combined application could significantly increase the yield of sorghum. The uptake of K was higher in NPK and NP treatments. The nitrogen harvest index was significantly decreased by applying nitrogen fertilizer, but the yield index was not significantly affected by the application of phosphorus and potassium fertilizer. The highest agronomic efficiency of fertilizer was phosphorus fertilizer. Nitrogen fertilizer in the middle. Fertilizer use efficiency of nitrogen fertilizer is the highest, phosphorus fertilizer is the lowest. Combined with different fertilization treatment of nutrient supply capacity, sorghum yield, nutrient uptake and utilization rate know. The rational input of nitrogen fertilizer and the rational application of phosphorus fertilizer should be strengthened in sorghum fertilization in this area.
【作者单位】：辽宁省水土保持研究所;朝阳师范高等专科学校;朝阳市双塔区种子管理站;
【基金】：国家高粱产业技术体系朝阳综合试验站(CARS-06-04-03)
【分类号】：S158.3;S514
【正文快照】： 土壤肥力是决定土地生产力的基本条件,土壤养分供给能力是评价土壤肥力的重要指标,土壤供肥能力越高,作物越容易获得持续高产和稳产。施肥是影响土壤肥力、养分吸收利用和作物产量的重要措施。不同施肥措施还对土壤结构和土壤可持续生产能力产生重要影响[1-3]。施肥的产量反应

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