摘要
用新的土壤无机磷分级方法对20个石灰性土壤中磷的存在形态进行分级测定,并以“连续矿化——栽培微钵试验”植物吸磷量为参比项进行相关研究。结果表明。Ca_2-P是植物最有效的直接磷源。Al-P以及Ca_8-P和Fe-P与Ca_2-P有极高的相关性,直接影响Ca_2-P含量,也是植物的有效磷源。
New grade method of soil inorgnic phosphorus was used in determining the existing form of phosphorus in 20 calcareous soils.The amount of phosphorus absorbed by plant in 'continuous minerlization-cultivate microhowl experiment'was also studied, which was used as reference to the former,The results indicated that Ca_2-P was the most effective direct phosphorus source of plant. A higher correlation existed between the Al-P、 Ca_8-P、Fe-P and Ca_2-P. Al-P、Ca_8-P and Fe-P were sources of effective phosphorus and effected the conteut of Ca_2-P.
出处
《莱阳农学院学报》
1993年第2期79-82,共4页
Journal of Laiyang Agricultural College
关键词
石灰性土壤
磷
calcareous soil
form of phosphorus
continuous minerlization—microbowl experiment
