摘要
应用蒋柏藩、顾益初提出的“石灰性土壤无机磷分级方法”研究了山东省石灰性潮土、褐土、砂姜黑土的无机磷组成、转化和对作物的有效性。结果表明,石灰性土壤无机磷中以Ca10-P占绝对优势,约占无机磷总量的54.52％,其次为O-P,占21.55％,Al-P、Fe-P,Ca8-P分别占5～10％,Ca2-P只有1.08％;在土壤剖面中各级无机磷皆随剖面深度增加而减少;水溶性磷肥施入土壤后,在作物一个生长季节内主要转化成Ca8-P,占全部转化量的50～70％,其次是Ca2-P,占10～30％,Al-P占11～13％,Fe-P很少,占5％左右;在各级无机磷中对作物有效性顺序是Ca2-P>Al-P、Fe-P>Ca8-P>O-P、Ca10-P。
We investigated fractions, transformation and bioavailability of inorganic phosphorus (P) in calcareous soils, alluvial soil, cinnamon soil and black clay soil in Shandong province. Results indicated that the fraction of Ca10 - P accounts for 54.52% of the total inorganic phosphorus, followed by O - P 21. 55%, Al - P(5 - 10% ), Fe - P(5 -10% ) and Ca8 - P(1.08% ) respectively. Each fraction of inorganic phosphorus appears to decrease with soil depth. When soluble phosphorus was added to the soil, it was mainly transformed into Ca8 - P, constituting up to 50 - 70 % during one cropping period. In contrast, only 10 - 30%, 11 - 13 % and 5 % were converted into Ca2 - P, Al - P and Fe - P forms respectively. Results indicated that the various fractions of inorganic phosphorus showed different bioavailability with an order of Ca2 - P>Al - P, Fe - P>Ca8 - P>O - P, Ca10 - P.
出处
《土壤通报》
CAS
CSCD
北大核心
2003年第5期422-426,共5页
Chinese Journal of Soil Science
基金
山东省科委项目"粮食高产需肥规律及配套施肥技术"部分研究内容
