{"id":1117,"date":"2014-12-23T14:13:57","date_gmt":"2014-12-23T13:13:57","guid":{"rendered":"http:\/\/ist.blogs.inra.fr\/afs\/?p=1117"},"modified":"2014-12-23T14:13:57","modified_gmt":"2014-12-23T13:13:57","slug":"changes-in-soil-phosphorus-fractions-after-9-years-of-continuous-nitrogen-addition-in-a-larix-gmelinii-plantation","status":"publish","type":"post","link":"https:\/\/ist.blogs.inrae.fr\/afs\/2014\/12\/23\/changes-in-soil-phosphorus-fractions-after-9-years-of-continuous-nitrogen-addition-in-a-larix-gmelinii-plantation\/","title":{"rendered":"Changes in soil phosphorus fractions after 9 years of continuous nitrogen addition in a Larix gmelinii plantation"},"content":{"rendered":"<script type='text\/javascript' src='https:\/\/d1bxh8uas1mnw7.cloudfront.net\/assets\/embed.js'><\/script><h3 class=\"a-plus-plus\">Kai Yang, Jiaojun Zhu, Lizhong Yu, Zhengquan Wang<\/h3>\n<address class=\"a-plus-plus\"><span class=\"affiliation\">Qingyuan Forest CERN, Chinese Academy of Sciences, Shenyang, 110016;\u00a0<\/span><span class=\"affiliation\"> State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110164; <\/span><span class=\"affiliation\">Institute of Applied Ecology, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016;<\/span> <span class=\"affiliation\"> School of Forestry, Northeast Forestry University, Harbin, 150040, People\u2019s Republic of China <\/span><\/address>\n<p class=\"a-plus-plus\"><strong class=\"a-plus-plus\">N addition decreased soil inorganic P availability, microbial biomass P, and acid phosphatase activity in the larch plantation. Soil inorganic P availability decreased after N addition due to the changes in both microbial properties and plant uptake.<\/strong><\/p>\n<p class=\"a-plus-plus\" style=\"text-align: justify\">Soil phosphorus (P) availability is considered an important factor in influencing the biomass production of plants. Sustained inputs of nitrogen (N) through atmospheric deposition or N fertilizers, particularly in temperate forests, may change the composition and availability of P and thus affect long-term forest productivity. The objective of this study was to assess soil P availability, P fractions, and microbial properties including microbial biomass P and acid phosphatase activity after 9 consecutive years of N addition in a larch (<em class=\"a-plus-plus\">Larix gmelinii<\/em>) plantation, northeastern China. From 2003 to 2011, NH<sub class=\"a-plus-plus\">4<\/sub>NO<sub class=\"a-plus-plus\">3<\/sub> was added to replicate plots (three 20\u00a0m\u2009\u00d7\u200930\u00a0m plots) in the larch plantation each year at a rate of 100\u00a0kg\u00a0N\u00a0ha<sup class=\"a-plus-plus\">\u22121<\/sup>\u00a0year<sup class=\"a-plus-plus\">\u22121<\/sup>. Soil samples from 0\u201310-cm and 10\u201320-cm depths were collected in N addition plots and control (no N addition) plots. N addition significantly decreased soil NaHCO<sub class=\"a-plus-plus\">3<\/sub>-Pi (Pi is inorganic P), microbial biomass P, and acid phosphatase activity but increased the NaOH-Pi concentration. N addition appeared to induce a decrease in soil inorganic P availability by changing pH and P uptake by trees. In addition, N addition significantly decreased the NaOH-Po (Po is organic P) concentration, possibly because of increased P mineralization. However, the total P and other P fractions were unaffected by N fertilization. Our results suggest that N addition enhanced P uptake by trees, whereas it reduced soil inorganic P availability as well as microbial biomass and activity related to soil P cycling in the larch plantation.<\/p>\n<p class=\"a-plus-plus\" style=\"text-align: justify\">\n<p class=\"a-plus-plus\" style=\"text-align: justify\"><a href=\"http:\/\/link.springer.com\/article\/10.1007\/s13595-014-0444-7\" target=\"_blank\">See full text in Annals of Forest Science<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kai Yang, Jiaojun Zhu, Lizhong Yu, Zhengquan Wang Qingyuan Forest CERN, Chinese Academy of Sciences, Shenyang, 110016;\u00a0 State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110164; Institute of Applied Ecology, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016; School of Forestry, Northeast Forestry University, Harbin, [&hellip;]<\/p>\n","protected":false},"author":35,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,15],"tags":[],"class_list":["post-1117","post","type-post","status-publish","format-standard","hentry","category-article-type","category-research-paper","cat-14-id","cat-15-id"],"_links":{"self":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/1117","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/users\/35"}],"replies":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/comments?post=1117"}],"version-history":[{"count":0,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/1117\/revisions"}],"wp:attachment":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media?parent=1117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/categories?post=1117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/tags?post=1117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}