太湖地区黄泥土氮肥对水稻产量、叶片碳氮同化及不同土层氮的影响  

EFFECTS OF LONG-TERM NITROGEN APPLICATION ON YIELD,CARBON-NITROGEN ASSIMILATION IN LEAVES AND SOIL NITROGEN

作　　者：郭汝礼[1] 沈明星 卢萍[1] 殷士学[3] 杨林章[1] 

机构地区：[1]中国科学院南京土壤研究所,南京210008 [2]苏州农业科学研究所,江苏苏州215001 [3]扬州大学资源与环境学院,江苏扬州225124

出　　处：《土壤学报》2006年第4期592-598,共7页Acta Pedologica Sinica

基　　金：国家科技部973项目(2005CB121108);中国科学院知识创新工程项目(KZCX2-413)资助

摘　　要：在长期定位试验的基础上研究了太湖地区黄泥土不同施氮水平对水稻产量、碳氮同化及不同土层氮的影响。结果表明,长期施氮量(N)在161.0 kg hm-2处理和高于该施氮量处理的产量之间没有显著差异。拔节期、孕穗期和灌浆期施氮量在161.0 kg hm-2处理和高于该施氮量处理的碳氮同化水平之间几乎没有差异,但都高于施氮量在57.5 kg hm-2处理的。不同土层氮分布结果表明,长期施氮量在161.0 kg hm-2和高于该施氮量各处理中,长期施入有机肥配施NPK肥处理残留最深,其次是长期施入化肥N的处理,长期秸秆还田配施N肥处理较浅。Based on long term stationary experiment, effects of long-term nitrogen application on yield, carbon-nitrogen assimilation of leaves and soil nitrogen in permeable paddy soil in the Tai Lake region were studied. Results show that no significant difference was found between the treatment applied with N 161.0 kg hm^-2and treatments applied with more nitrogen than N 161.0 kg hm^-2 in either yield or in carbon-nitrogen assimilation rate in leaves at the jointing, booting and filling stages. But all these treatments were higher than the treatments applied with N 57.5 kg hm^-2 in both indices. Analysis of nitrogen distribution in soil profiles reveals that soil N residue went down the deepest in the treatment applied with organic manure plus NPK, which was followed by treatments applied with N 161.0 kg hm^-2 or more in chemical fertilizer. And N residue was found the shallowest in the treatment of incorporation of crop stalks into the soil plus N application.

关 键 词：长期施肥 碳氮同化 还原糖 全氮 

分 类 号：S153.6[农业科学—土壤学] S511[农业科学—农业基础科学]