速效钾,是指土壤中易被作物吸收利用的钾素。包括土壤溶液钾及土壤交换性钾。速效钾占土壤全钾量的0.1%〜2%。其中土壤溶液钾占速效钾的1%〜2%,由于其所占比例很低,常将其计入交换钾。速效钾含量是表征土壤钾素供应状况的重要指标之一。
对于钾肥管理来说,当土壤中速效钾(Olsen-K)含量低于 70mg/kg(K),钾肥管理的目标是通过增施钾肥提高作物产量和土壤速效钾含量, 钾肥用量为作物带走量的 2 倍,施钾量为 ...
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...ging空间插值;速效钾;gis [gap=972]keywords: spatial variability; geostatistics; kriging interpolation ; soil potassium;gis ...
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...θ_m,θ_v),土壤饱和导水率(Ks)等;土壤化学指标有:全氮(TN),硝态氮(NO_3~--N),铵态氮(NH_4~+-N),全磷(TP),速效磷(AP),速效钾(AK),..
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Rain intensity has more effect on the loss of soil, slowly available K, and rapidly available K than slope gradient.
雨强比坡度对土壤、缓效钾和速效钾的流失影响更大。
参考来源 - 黄土区土壤钾素径流流失规律研究The nutrient content in forest soil was improved clearly, the content of available phosphorus and effective potassium had significant difference among treatments, also soil organic matters increased evidently.3.
林下土壤中养分含量在施肥后也有明显的提高,特别是速效钾、速效磷在处理间差异显著,土壤有机质也有明显的提高。
参考来源 - 修剪施肥对油茶生长结实特性影响研究·2,447,543篇论文数据,部分数据来源于NoteExpress
速效钾含量处于中下水平的生产单位占77.3%;
Rapidly available potassium contents in 77.3 % production units were middle.
结果表明:土壤速效钾含量随沸石施用量的增加而增加;
The results showed that the content of available potassium in soil increased with clinoptilolite application increase.
土壤中的有机质、碱解氮、速效磷、速效钾的含量均比对照增加。
And it could improve the contents of organic matter, alkali - hydrolyzable nitrogen, available phosphorus and potassium in soil.
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