长期定位试验土壤钾素肥力变化及其对不同测钾方法的响应
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

中科院创新工程重要方向项目(KSCX2-YW-N-002)和国家自然科学基金项目(NSFC40201027)资助


Change of Soil Potassium Fertility in Long-Term Located Field Experiment and Comparison of Different Methods to Measure Potassium Change in Soil
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    土壤K素肥力因长期施肥管理可能会发生变化。本文以土壤K素肥力相对较高的河南封丘 16 年长期定位试验土壤为研究对象,分析比较了不同施肥处理对土壤K素肥力的影响,以及常规速效K、缓效K、全K和两种四苯硼钠法等土壤测K方法对土壤K素变化的响应能力。16 年K肥施用量和作物吸K量的差值表明,不施K土壤K素发生耗竭,任何肥料都不施的CK处理K耗竭较少,为 K 28.5 kg/(hm2·a),而不施K的NP处理中K的耗竭速率较高,为 CK 处理的 5.2 倍, 所有施K土壤中由于作物吸K量小于K肥施用量,表现为土壤K素盈余,其中不施P或N的NK和PK处理K素盈余最高,分别达 K 207 和 190.5 kg/(hm2·a),平衡施用化肥或有机肥土壤K的盈余较少,为K 31.5 ~ 63.0 kg/(hm2·a)。不同土壤测K方法反映的 16 年前后土壤K素变化与以上理论值均有差异,醋酸铵法、沸硝酸法、两种四苯硼钠法和碱熔法反映的 7 个不同施肥处理K素变化的回收率(测定值与理论值的比率)平均值分别为 39% 、51%、66%、71% 和176%,7 个施肥处理回收率的变异系数5种方法分别为103%、74%、36%、30% 和141%。回收率偏离估计值较大并且不稳定,说明土壤常规测K方法(速效K、缓效K和全K)不能够准确地反映土壤K素肥力的变化,而四苯硼钠法较常规方法可以较准确地反映土壤K素变化。

    Abstract:

    Soil potassium fertility could probably be changed by long-term fertilization management. Effect of 16-year different fertilization treatments on the change of potassium fertility in soil of a long-term field experiment located in Fengqiu County, Henan Province,China was studied in this paper. Five soil K testing methods (1 mol/L NH4OAC method, 1 mol/L boiling HNO3 method, total potassium method and two kinds of sodium tetraphenylboron (NaTPB) methods) were compared with regards to their ability to recover K change in soils. The results of soil K balance based on 16-year K input of fertilization and K removal by crop harvest showed that soil K depletion occurred in the soils without input of fertilizer K. K depletion rate of NP (apply nitrogen and phosphorus fertilizers) treatment was 5.2 time as that of the CK (without fertilizer) treatment which was K 28.5 kg/(hm2·a). For all the other 5 treatments with fertilizer K applied, soil K got positive balance because that the amount of K applied was higher than the amount K removed by crops. The higher soil K accumulation rates were found in the NK (apply nitrogen and potassium fertilizers) and PK (apply phosphorus and potassium fertilizers) treatment, that was K 207 and 190.5 kg/(hm2·a), respectively. While the K accumulation rates in soils treated with balanced fertilizers were comparatively lower, which ranged from K 31.5 to 63.0 kg/(hm2·a). The change of soil K measured by 5 soil testing methods differred from the estimated value calculated by soil K balance and the mass of the topsoil in the field. The average recovery rate (ratio of value determined to the value estimated) of change of soil K of 7 fertilizers treatment determined by 5 methods (1mol/L NH4OAC method, 1 mol/L boiling HNO3 method, two kinds of NaTPB methods and total potassium method ) were 39%, 51%, 66%, 71% and 176%, respectively. The variation coefficient of the recovery rate of the above 5 methods were 103%, 74%, 36%, 30% and 141%, respectively. The results indicated that the conventional 1 mol/L NH4OAC method, 1 mol/L boiling HNO3 method and total potassium method were not suitable for determination of K change in soils, while the NaTPB methods proposed were suitable for this purpose.

    参考文献
    相似文献
    引证文献
引用本文

孙海霞,王火焰,周健民, 杜昌文,陈小琴,钦绳武.长期定位试验土壤钾素肥力变化及其对不同测钾方法的响应[J].土壤,2009,41(2):212-217. SUN Hai-xia, WANG Huo-yan, ZHOU Jian-min, DU Chang-wen, CHEN Xiao-qin, QIN Sheng-wu. Change of Soil Potassium Fertility in Long-Term Located Field Experiment and Comparison of Different Methods to Measure Potassium Change in Soil[J]. Soils,2009,41(2):212-217

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期:
  • 出版日期: