The Study On Soil Phosphorus Status Of Long-Term Different Fertilizeration Management In The Majority Ecological Region Of China

The soil Phosphorus of the five agriculture ecological stations of Chinese Academy of Science was studied. The results showed that the total Phosphorus and fractionations increased of different treatments by fertilization. The ranges of increased P contents of different fractions and T-P were different for there were many diversities such as ecology factors fertilizer treatments, crops species ,characteristics of weather and so on. The different fractions of P represented difference with region characteristics.1. The content of T-P and its background value represented characteristics of different region: The T-P content of Black soil was 654～1017 mg kg^-1,increasing 25.37%～45.34% compared with its background value.And the T-P content of the Helu soil, Fluvaquentic soil, Paddy soil and Red earth were 743～978, 625～875, 926 ～ 934 and 356～737 mg kg^-1,respectively, increasing 18.05%～38.40%%,27.28%～76.89%, 14.24%～28.0% and 18.95%～45.45%, respectively,compared with their background value.2. The characteristics of Pi/T-P & Po/T-P was appearance with different region:From North to South in the eastern of China in wetness ocean weather, the ranges of Po/T-P of Black soil, Paddy soil and Red earth were 70～60%,15～23% and 32³9%, respectively. Also from east to west i of China from wetness ocean weather, semiwetness and then semiarid climate the ranges of Po/T-P of Paddy soil ,Fluvaquentic soil and Helu soil were 15～23%, 25～39%and 17～41%, respectively.3. The characteristics of the content of inorganic phosphorus were showed in region distributing as following:From North to South :The Black soil,Paddy soil, Red earth and Red earth of Applying organic fertilizer were Fe-P (104～88)> Ca₁₀-P(98～84) >Al-P(47～32)> Ca₈-P(36～19)> Ca₂-P(30～7) >O-P(11～ 7); Ca₁₀-P(425～360) > O-P(143 ～101) >Fe-P (103 ～ 54) > Al-P(65～29) >Ca₈-P(45～18) >Ca₂-P(22～3); O-P(188～110) >Fe-P (145 ～ 64) > Al-P(78～12) >Ca₁₀-P(65～25) > Ca₂-P(39～0.5) >Ca₈-P(12～0.1) and Fe-P (152～120) > Al-P(100～44) >Ca₁₀-P(75～32) > Ca₈-P(138～8) > Ca₂-P(74～5) > O-P(155～5), respectively.Also from east to west : Paddy soil,Fluvaquentic soil and Helu soil were Ca₁₀-P(425～360) > O-P(143～101) >Fe-P (103～54) > Al-P(65～29) >Ca₈-P(45～18) >Ca₂-P(22～3); Ca₁₀-P(344～269) > Ca₈-P(185～27)> O-P(92～63) >Fe-P (53～18)> Al-P(44～17) >Ca₂-P(42～0.5) and Ca₁₀-P(440～360) > Ca₈-P(140～35)> O-P(78～30)...