Combined extractive agent for neutral soil and calcareous soil nutrient

This invention relates to a soil nutrient combined extractive agent, especially to a neutral, lime soil nutrient combined extractive agent related obviously with conventional extracting effect and leaching multiple kinds of soil effective nutrients at the same time which is a solid powder containing Na ions, sulphate, acetate, bicarbonate and carbonate multiple effective nutrient to be mixed to water solution to extractor in neutral, lime soils, eg.: to extract ammonia nitrogen, nitrate nitrogen, fast-effective P and fast-effective K at the same time. 本发明涉及一种土壤养分联合浸提剂，特别是涉及一种可同时浸提多种土壤有效养分且浸提效率高、浸提能力强、与常规浸提效果显著相关的中性、石灰性土壤养分联合浸提剂，是一种含有钠离子、硫酸盐、醋酸盐、碳酸氢盐及碳酸盐的固体粉剂，配成水溶液后即可快速高效较为完全的浸提中性、石灰性土壤中的多种有效养分，如一次浸提出铵态氮、硝态氮、速效磷、速效钾等。