This study is aimed to investigate the activities of phosphomonoesterase (acid ,neutral ,and alkaline ),phosphodiesterase and phosphotriesterase in a rice planting meadow brown soil at the lower reach of Liao River,an...This study is aimed to investigate the activities of phosphomonoesterase (acid ,neutral ,and alkaline ),phosphodiesterase and phosphotriesterase in a rice planting meadow brown soil at the lower reach of Liao River,and their responses to different fertilization treatments.The results showed that there was no significant difference in soil total P and organic P contents among all treatments,but soil available P content was significantly higher in treatment OM than in other treatments.Soil acid and neutral phosphomonoesterase had a higher activity than alkaline phosphomonoesterase and phosphodiesterase,while phosphotriesterase had the lowest activity.No significant difference was found in phosphatase activities between different fertilization treatments.Soil acid phosphomonoesterase activity had a significant correlation with soil total P and available P contents,while soil phosphodiesterase activity significantly correlated with soil organic P content.展开更多
采用野外原位试验模拟氮(N)沉降,研究了其对鼎湖山马尾松林、混交林和季风林3种森林类型土壤酸性磷酸单酯酶活性(APA)和有效磷(AP)含量的影响.在季风林中设置对照(0 kg N.hm-2.a-1)、低N(50 kg N.hm-2.a-1)、中N(100 kg N.hm-2.a-1)和高...采用野外原位试验模拟氮(N)沉降,研究了其对鼎湖山马尾松林、混交林和季风林3种森林类型土壤酸性磷酸单酯酶活性(APA)和有效磷(AP)含量的影响.在季风林中设置对照(0 kg N.hm-2.a-1)、低N(50 kg N.hm-2.a-1)、中N(100 kg N.hm-2.a-1)和高N(150 kg N.hm-2.a-1)处理,在马尾松林和混交林中只设置对照、低N和中N处理.结果表明:随着土层加深,土壤APA和AP含量降低.土壤APA在季风林中最高,而AP含量在3种林型中没有显著差异.N沉降增加对土壤APA的作用与林型有关.季风林中适度N沉降可使APA升高,且低N处理的APA(19.52μmol.g-1.h-1)最高;马尾松林和混交林中,中N处理的APA最高,分别为12.74和11.02μmol.g-1.h-1.3种林型的AP含量均在低N处理下最高,但各N处理之间的差异并不显著.土壤APA与AP含量之间呈显著正相关关系.展开更多
文摘This study is aimed to investigate the activities of phosphomonoesterase (acid ,neutral ,and alkaline ),phosphodiesterase and phosphotriesterase in a rice planting meadow brown soil at the lower reach of Liao River,and their responses to different fertilization treatments.The results showed that there was no significant difference in soil total P and organic P contents among all treatments,but soil available P content was significantly higher in treatment OM than in other treatments.Soil acid and neutral phosphomonoesterase had a higher activity than alkaline phosphomonoesterase and phosphodiesterase,while phosphotriesterase had the lowest activity.No significant difference was found in phosphatase activities between different fertilization treatments.Soil acid phosphomonoesterase activity had a significant correlation with soil total P and available P contents,while soil phosphodiesterase activity significantly correlated with soil organic P content.
文摘采用野外原位试验模拟氮(N)沉降,研究了其对鼎湖山马尾松林、混交林和季风林3种森林类型土壤酸性磷酸单酯酶活性(APA)和有效磷(AP)含量的影响.在季风林中设置对照(0 kg N.hm-2.a-1)、低N(50 kg N.hm-2.a-1)、中N(100 kg N.hm-2.a-1)和高N(150 kg N.hm-2.a-1)处理,在马尾松林和混交林中只设置对照、低N和中N处理.结果表明:随着土层加深,土壤APA和AP含量降低.土壤APA在季风林中最高,而AP含量在3种林型中没有显著差异.N沉降增加对土壤APA的作用与林型有关.季风林中适度N沉降可使APA升高,且低N处理的APA(19.52μmol.g-1.h-1)最高;马尾松林和混交林中,中N处理的APA最高,分别为12.74和11.02μmol.g-1.h-1.3种林型的AP含量均在低N处理下最高,但各N处理之间的差异并不显著.土壤APA与AP含量之间呈显著正相关关系.
基金the National Natural Science Foundation of China(41171241)National Key Basic Research Development Program of China(973 Program)(2011CB100506)National Twelfth Five-Year Science and Technology Support Plan(2012BAD14B04)
