Effects of Long-term Fertilization on Fractions and Distribution and Availability of Phosphorus in Cinnamon Soil and Its Micro-aggregates

doi:10.7668/hbnxb.2011.06.036

Abstract

Abstract: Eight years location experiment was conducted in cinnamon soil in Hebei province to study the effect of long-term fertilization on fractions and distribution and availability of phosphorus in cinnamon soil and its microaggregates． The results showed that the composition of phosphorus in cinnamon soil was main inorganic phosphorus． With the sizes of micro-aggregates decreased， the content of every P fractions increased． The effectiveness of phosphorus in ＜10 μm micro-aggregates was highest，and in 10-50 μm micro-aggregates lowest． No fertilization remarkably decreased the content of every P fractions in cinnamon soil and its micro-aggregates． Fertilization increased the content of phosphorus in cinnamon soil and its micro-aggregates． The increase of the content of total phosphorus and inorganic phosphorus with increment NPK fertilizers was most． The content of organic P and available P with application organic manure combined with usual NPK was higher than the other treatments． Range of P consumption and accumulation in every sizes micro-aggregates was different under different fertilizer regimes． The constant NPK fertilizers decreased the effectiveness of phosphorus in soil and its micro-aggregates． Organic manure combined with usual NPK fertilizers remarkably increased the effectiveness of residual phosphorus． And it is the most effective way to improve soil phosphorus fertility．

Key words: Long-term fertilization, Cinnamon soil, Micro-aggregates, Phosphorus, Fractions and distribution, Availability

CLC Number:

S158． 5

HAN Zhi-qing, HAN Zhi-cai, ZHANG Dian-xue, WANG Qiu-bing, WU Su-xia, CHANG Lian-sheng, XIE Xin-yu, YANG Hui-min. Effects of Long-term Fertilization on Fractions and Distribution and Availability of Phosphorus in Cinnamon Soil and Its Micro-aggregates[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2011, 26(6): 189-195. doi: 10.7668/hbnxb.2011.06.036.

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