%0 Journal Article
%T Laws of annual nutrient uptake in a Paulownia plantation
%A Wu Gang
%A <br>Wu
%A Gang
%J 环境科学学报(英文版)
%D 1996
%I 
%X Characteristics of annual nutrient uptake of a 8-yr.-old Paulownia(Paulownia tomenlosa Steed×Paulownia fortunei Hemsl) plantation (spacing 6m×10m) at Fengqiu Paulownia Experimental Station in the Yellow River, Huaihe River and Haihe River plains were studied within 2 years.Annual total uptakes of 5 macronutrients (N,P,K,Ca and Mg)in 1989 and 1990 were 287.3238 and 242.4234 kg/(hm2.a),respectively. The study came to the following laws:(1)the nutrient uptakes of the Paulownia organs followed the order:leaves>branches>flowers>stems> roots;(2) the uptakes for different nutrient elements followed the sequence: N>Ca>K>P>Mg;(3)different organs of the Paulownia showed selective uptake and retention for the essential nutrients;(4) Paulownia's uptake of nutrient elements was mainly conducted during the period between the beginning of growth and the end of July.
%K Paulownia
%K plantation
%K nutrient
%K uptake<br>Paulownia
%K plantation
%K nutrient
%K uptake.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=4E7A0266A1124E1443EAA6DBC87B8AB7&yid=8A15F8B0AA0E5323&vid=5D311CA918CA9A03&iid=E158A972A605785F&sid=A03A15CF5604A8B0&eid=9296A146D1D94BC4&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=0