改性尿素N在土壤-烟株系统中

来源 :核农学报 | 被引量 : 0次 | 上传用户:luoqiuqiu80
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
在盆栽烟草条件下采用15N示踪方法研究尿素改性前后N在土壤烟株中的分布规律,并比较尿素改性前后N的利用率大小.结果表明,尿素改性后比改性前烟叶增产25.16%,达1%显著水准.烟株全N量,改性后是改性前处理的145.7%.从肥料中吸收的N量,改性后是改性前处理的127.9%.从土壤中吸收的N量,改性后是改性前处理的158.3%.N肥利用率,改性后处理为45.8%,比改性前处理提高10.1个百分点.N的回收率,改性后处理达98.3%,比改性前处理提高12.8个百分点.改性尿素省肥增产的主要原因是刺激作物从土壤N库中吸收了较多N素,同时所施N肥的利用率有明显提高.
其他文献
TiCN coating,owing to its superior wear-resistance,has been frequently applied in many fields. TiCN thick coating was first prepared by reactive plasma spraying
The definition of pillar industry is stated and its indicators, including the proportion of added value in the GDP, the degree of industry correlation, the inco
Having analyzed the relationships between washing shrinkage and weaving technique, parameters, material properties of woven fabrics and studied the shrinkage me
A novel technology of tuyere protection is introduced. The ceramic coat is synthesized by using in-situ combustion process as the internal, external, and nose p
The Pangolin, a soil-burrowing animal, is covered with scales. These scales are often abraded by soil and rock and their surface is corrugated. The abrasive wea
An improved genetic algorithm is proposed to solve the problem of bad real-time performance or inability to get a global optimal/better solution when applying s
A series of new-type nanometer TiO2 modified polyacrylic copolymer sizing agent were synthesized from acrylic acid, ethyl acrylate, nanometer TiO2, oleic acid e
The centralized processing of high-sulfur and high-acidity crude has contributed to improvement of the overall economic benefits of the oil refining enterprise,
The contour of the slices of SLA parts is composed of a great deal of small lines. When offsetting the contour to compensate for the radius of laser spot, many
在水分低胁迫条件下 ,对不同棉花品种根系生长发育和分布规律进行了研究 ,结果表明 ,杂交抗虫棉根系早发易衰 ,常规抗虫棉晚发迟熟 ,中早熟常规棉介于前两者之间 ,耐旱碱棉根