不同植物对黑色石灰岩土壤磷素的利用  

Utilization of Phosphorus by Plants in Black Calcareous Soil

作　　者：朱海燕[1] 钟章成[1] 刘忠德[1] 

机构地区：[1]西南大学生命科学学院

出　　处：《林业科学》2006年第7期127-130,共4页Scientia Silvae Sinicae

基　　金：国家自然科学基金项目(30370279)

摘　　要：Plant utilization of phosphorus in black calcareous soil was studied in Bidens pilosa, Mahonia fortunei and Cupressus funebris. Soil pH value, available phosphorus content, the distribution and transformation of inorganic phosphorus in rhizosphere and nonrhizosphere soils of these three plants were measured. Phosphorus content of plant was also measured and was 3 475, 2 609 and 3 466 mg·kg -1 in B. pilosa, M. fortunei and C. funebris, respectively. The pH value in rhizosphere soil was significantly lower （P<0.05） than that of nonrhizosphere in B. pilosa （7.35 compared with 7.47）, M. fortunei （7.47 compared with 7.67） and C. funebris （7.42 compared with 7.49）. Available phosphorus of B. pilosa was accumulated in rhizosphere soil, but those of the other two species in rhizosphere soil were decreased. Compared with the content in nonrhizosphere soil, the contents of Ca2P and （Ca8P+FeP+AlP） of B. pilosa in rhizosphere soil were increased by 0.89% and 2.13%, respectively, while the content of （Ca 10P+OP） was decreased by 3.03%, the total content of inorganic phosphorus of B. pilosa in rhizosphere soil was lower than that in nonrhizosphere soil. The content of （Ca8P+FeP+AlP） of C. funebris in rhizosphere soil was increased by 0.92%, while the contents of Ca2P and （Ca 10P+OP） were decreased by 0.09% and 0.83%, respectively. The total content of inorganic phosphorus of C. funebris in rhizosphere soil was lower than that in nonrhizosphere soil. The content of Ca2P of M. fortunei in rhizosphere soil was unchanged, the content of （Ca8P+FeP+AlP） was decreased by 1.29%, and the content of （Ca 10P+OP） was increased by 1.29%. The total content of inorganic phosphorus of M. fortunei in rhizosphere soil was higher than that in nonrhizosphere soil. The results showed that B. pilosa could decrease the pH value of the rhizosphere soil and activate （Ca 10P+OP）, elevate the level of available phosphorus, effectively absorb and accumulate phosphorus from the soil. Utilization of phosphorus iPlant utilization of phosphorus in black calcareous soil was studied in Bidens pilosa, Mahonia fortunei and Cupressus funebris. Soil pH value, available phosphorus content, the distribution and transformation of inorganic phosphorus in rhizosphere and non-rhizosphere soils of these three plants were measured. Phosphorus content of plant was also measured and was 3 475, 2 609 and 3 466 mg· kg^- 1 in B. pilosa, M. fortunei and C. funebris, respectively. The pH value in rhizosphere soil was significantly lower （P 〈 0.05） than that of non-rhizosphere in B. pilosa （7.35 compared with 7.47）, M. fortunei （7.47 compared with 7.67） and C. funebris （7.42 compared with 7.49）. Available phosphorus of B. pilosa was accumulated in rhizosphere soil, but those of the other two species in rhizosphere soil were decreased. Compared with the content in non- rhizosphere soil, the contents of Ca2-P and （Ca8-P ＋ Fe-P ＋ Al-P） of B. pilosa in rhizosphere soil were increased by 0.89% and2.13%, respectively, while the content of （Ca10-P ＋ O-P） was decreased by 3.03%, the total content of inorganic phosphorus of B. pilosa in rhizosphere soil was lower than that in non-rhizosphere soil. The content of （ Ca8-P ＋ Fe-P ＋ Al-P） of C. funebris in rhizosphere soil was increased by 0.92%, while the contents of Ca2-P and （Ca10-P ＋ O-P） were decreased by 0.09% and 0.83%, respectively. The total content of inorganic phosphorus of C. funebris in rhizosphere soil was lower than that in non-rhizosphere soil. The content of Ca2-P of M. fortunei in rhizosphere soil was unchanged, the content of （ Cas -P ＋ Fe- P ＋ Al-P） was decreased by 1.29%, and the content of （Ca10-P ＋ O-P） was increased by 1.29% . The total content of inorganic phosphorus of M. fortunei in rhizosphere soil was higher than that in non-rhizosphere soil. The results showed that B. pilosa could decrease the pH value of the rhizosphere soil and activate （ Ca10-P ＋ O-P）, elevate the level of available phosphorus, effectively a

关 键 词：石灰岩土壤 适生植物 根际 磷 

分 类 号：Q142.3[生物学—生态学]