不同施磷水平对蔬菜地磷素淋失的影响研究

来源 :漳州师范学院学报(自然科学版) | 被引量 : 0次 | 上传用户:daxian005
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
通过土柱淋溶模拟实验研究不同施磷水平对磷素淋失的影响.结果表明,随着施磷量的增加,淋洗液TP、DTP浓度和累积淋失量均呈递增趋势,各时间段测定的TP、DTP浓度均与施磷量呈极显著的正相关(r值范围0.848^**-0.995^**),TP、DTP的累积淋失量与施P量之间亦呈极显著的正相关(r分别为0.963^**和0.962^**),施磷提高了各土层土壤的Olsen-P含量,说明增施磷肥是导致地下水磷污染的重要原因.
其他文献
基于单向S-粗集和一般二元关系R,本文给出广义单向S-粗集,对广义单向S-粗集的一般结构进行了描述,对广义单向S-粗集的有关性质进行了讨论.广义单向S-粗集为研究一般系统动态
用6-氨基喹啉基-N-羟基琥珀酰亚胺基-氨基甲酸酯(AQC)柱前衍生荧光法检测短小棒状杆菌(Corynebacterium parvum,Cp)水解液中各种游离氨基酸种类及含量,除色氨酸被水解而未被检出外,C
大学生野外生存生活实践课主要是通过野外的实践活动,进一步提高学生的野外知识与技能,是整个课程的最主要环节;加强野外生存生活实践课的组织工作,是提高野外生存生活训练课
The basic sets of solutions in class H( or H^*) for the characteristic equation and its adjoint equation with Hilbert kernel are given respectively. Thus the ex
In martingale setting, it has been shown that Ap weights can be factorized in terms of A1 weights. This factorization benefits many problems very much. ]n this
We put forward an optimal disk schedule with n disk requests and prove its optimality mathematically. Generalizing the idea of an optimal disk schedule, we remo
Based on decisional Diffie-Hellman problem, we propose a simple proxy-protected signature scheme. In the random oracle model, we also carry out the strict secur
This paper investigates some conditions which imply the strong laws of large numbers for Banach space valued random variable sequences. Some generalizations of
研究以柚类品种龙柚为材料,对发育过程中果皮、果肉总钙和可溶性Ca^2+含量及Ca^2+-ATPase活性进行了测定.结果表明:龙柚花前至花期子房总钙含量相对较低,花后有明显上升;龙柚果皮总
The existence and uniqueness of the modified Uzawa-Lucas growth model which incorporates unskilled labor as a distinct factor from human capital are given and t