摘要
采用室内培养和温室盆栽连续耗竭试验的方法，对河北省褐、潮土区土壤钾素形态，含量水平及供钾能力进行了研究。结果表明，褐、潮土区有效钾含量平均在中等偏上水平，区域间元明显差异，而缓效钾含量冀东土壤明显低于冀中南土壤。在耗竭种植条件下，土壤速效钾随着消耗出现“最低水平值”，植株吸钾来源部分来自速效钾，较大比例来自缓效钾。土壤速效钾可作为当季有效钾水平的衡量指标，缓效钾的实际贮量及释放能力是土壤供钾能力的一个重要标志。
Methods of indoor culture and greenhouse pot culture tests was adopted to conduct continuous potassium exhaustion experiments so as to study soil potassium form, content and supply capacity in cinnamon soil and chao soil zones of Hebei province. The results showed that the available potassium contents in cinnamon soil and chao soil zones was on the middle level or higher. There was no significant difference between these zones. But the slow release potassium contents in eastern part of Hebei province was significantly lower than that in the middle and southern parts of this province. For the exhausion culture experiments, available potassium content would appear the “lowest level value” after consumption. The source of patassium absorbed by crops came partly from available potassium, mainly from slow release potassium.The actual storage of potassium was an important mark of soil potassium supply capacity.
出处
《华北农学报》
CSCD
北大核心
1995年第3期98-102,共5页
Acta Agriculturae Boreali-Sinica
关键词
褐土
潮土
钾
供钾能力
土壤肥力
Cinnamon soil
Chao soil
Available potassium
Slow release potassium
Potassium supply capacity
