Effects of Different Polymer-Coated Potassium Chloride Dosages on Potato Yield, Quality and Soil Potassium Supply

GUO Xinsong1; DING Fangjun1; 2; CHEN Shigeng 1; 3; WANG Huanxi1; 3

doi:10.13870/j.cnki.stbcxb.2017.06.046

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Effects of Different Polymer-Coated Potassium Chloride Dosages on Potato Yield, Quality and Soil Potassium Supply

更新时间：2025-03-12

- Effects of Different Polymer-Coated Potassium Chloride Dosages on Potato Yield, Quality and Soil Potassium Supply
- Vol. 31, Issue 6, Pages: 296-301(2017)
- 作者机构：
  
  1. 土肥资源高效利用国家工程实验室,山东,泰安,271018
  2. 山东农业大学资源与环境学院,山东,泰安,271018
  3. 山东省腐植酸高效利用工程技术研究中心，山东农大肥业科技有限公司,山东,泰安,271016
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.06.046
  CLC： S532;S143.3+2
- Published：2017
- 稿件说明：
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GUO Xinsong1, DING Fangjun1, 2, et al. Effects of Different Polymer-Coated Potassium Chloride Dosages on Potato Yield, Quality and Soil Potassium Supply[J]. 2017, 31(6): 296-301.
DOI：

GUO Xinsong1, DING Fangjun1, 2, et al. Effects of Different Polymer-Coated Potassium Chloride Dosages on Potato Yield, Quality and Soil Potassium Supply[J]. 2017, 31(6): 296-301. DOI： 10.13870/j.cnki.stbcxb.2017.06.046.

摘要

利用马铃薯盆栽试验，通过设置不施钾肥、普通氯化钾、30%、50%、70%以及全量（等量于普通氯化钾）包膜氯化钾的处理，研究不同用量包膜氯化钾对马铃薯产量、品质及土壤钾素供应的影响。结果表明：包膜氯化钾25 ℃静水浸泡的钾素日均释放量约为1.2%，符合控释肥行业标准，在土埋下的钾素释放率呈“S”型，于70～90天释放率达到最大值，与马铃薯块茎形成及增长时期相吻合，有利于产量形成；较普通氯化钾，包膜氯化钾的马铃薯增产幅度为13.92%～36.54%；包膜氯化钾全量处理的Vc含量、可溶性蛋白及淀粉含量显著高于普通氯化钾，而包膜氯化钾全量施用的马铃薯还原性糖含量显著低于其他处理，降低幅度为13.9%～36.2%；包膜氯化钾钾素缓慢释放，满足植株后期对钾的需求，在块茎形成期后，包膜氯化钾50%以上用量处理的植株吸钾量显著高于其他处理；包膜氯化钾50%以上用量的土壤速效钾含量在块茎形成期后显著高于通氯化钾，同时，土壤水溶性钾与非特殊吸附钾含量较普通氯化钾分别增加8.4%～25.1%和9.3%～36.1%，土壤钾素供应充足。综上，包膜氯化钾50%以上用量有利于提高马铃薯产量、商品薯率和品质，同时增加土壤钾素供应。

Abstract

A potato pot experiment was conducted to study the effects of potassium chloride coated by polymer (PCK) with different dosages on potato yield

quality and soil potassium (K) supply

which set six treatments: no potassium

potassium chloride

30% PCK

50% PCK

70% PCK and 100% PCK dosage (with potassium chloride dosage equivalent). The results showed that the K released by 1.2% amount average of PCK in 25 ℃ water immersion

which met the controlled-release fertilizer industry standards. The K release rate was in “S” trend in the soil and reached the maximum value at 70～90 days

which was consistent with the potato potassium uptake in tuber formation period and beneficial to yield formation. The yields of potato were increased by 13.92%～36.54% under PCK different dosages compared with potassium chloride. The potato Vc

total soluble protein and starch contents of 100% PCK were significantly higher than that of potassium chloride

and the potato total reducing sugar content of 100% PCK was significantly lower than other treatments

the decreased amplitude was 13.9%～36.2%. The PCK released K slowly

which could meet the needs of the potato K uptake at later period. After the tuber formation period

potato K uptake amount of above 50% PCK dosage treatments were significantly higher than other treatments. Compared with potassium chloride

the content of soil available K content of above 50% PCK was significantly higher after the tuber formation period. At the same time

the soil water soluble K and non-specifically adsorbed K contents were increased by 8.4%～25.1% and 9.3%～36.1% respectively

so the soil K supply adequately. In conclusion

above 50% PCK dosage was beneficial to improve potato yield

commercial potato rate and quality

and increase soil K supply.

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