[Preliminary study on the association of lanthanum and phosphorous loss from soil].
Through laboratory lysimeter experiments and artificial rainfall experiments, characteristics of P and La transportation from both vertical and horizontal directions are investigated. The association between La and P loss from soil is preliminarily discussed. Results of lysimeter experiment show that both La and P are difficult to transport vertically. Downward depths are no deeper than 6-8 cm for all forms of La and P. With the increasement of exogenous La amount, the amount of Water soluble P, NaHCO3-extractable P and NaOH-extractable P decrease, while HCl-extractable P and residual form of P increase. Results of artificial rainfall experiment show that majority of La and P transport with fine soil particles in runoff, which is more than 95%. Loss of total P and La in runoff from the manure-applied soil are correlated significantly, both in loss rate and loss amount.
Liang
Tao
T
Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China. liangt@igsnrr.ac.cn
Chong
Zhong-Yi
ZY
Song
Wen-Chong
WC
Wang
Ling-Qing
LQ
Kleinman
P A
PA
D018556:Crops, Agricultural / Q000235:genetics; D004784:Environmental Monitoring; D007811:Lanthanum / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis*; D011891:Rain; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D014872:Water Movements
D012987:Soil; D012989:Soil Pollutants; D010758:Phosphorus; D007811:Lanthanum