ISWC OpenIR  > 水保所知识产出(1956---)
水肥一体化滴灌条件下氮素在土壤中的 时空分布特征
王旭洋1,3; 范兴科1,2
2016
Source Publication节水灌溉
Volume2016Issue:6Pages:55-58
Abstract

水肥一体化灌溉是提高水肥利用效率的主要途径之一。试验采取单点源滴水施肥模拟滴灌条件下水肥
一体化灌溉施肥过程,研究滴灌条件下氮素中的NO-
3 -N和NH+
4 -N在土壤湿润体中的时空分布特征。结果表明,
在灌水施肥结束后的1周时间内,土壤湿润体中NO-
3 -N和NH+
4 -N在靠近灌水施肥点处的含量较高,由灌水点向
外,随着距离的增大,其含量逐渐减小,在土壤湿润体的边缘,即湿润锋处,氮素的含量最低。随着时间的推移,NO-

-N和NH+
4 -N的分布变化表现为:NO-
3 -N的含量先增大后减小,在第5d达到最大值,此后含量有所降低。而
NH+
4 -N的含量相对较低,其含量始终低于NO-
3 -N的含量,且一直在减小,特别是在第3d以后迅速减小,到第5d
时湿润体内NH+
4 -N的含量甚至低于灌水前风干土的含量。

Other Abstract

In order to reduce the loss of nitrogen in the transport process of water and fertilization and improve its use efficiency,the
drip irrigation process is simulated by single point of the original drip fertilization to research the space-time distribution features of
nitrogen in the soil.The results show that the content of nitrogen near the fertilization-spot is higher;with the increase of distance,
the content of nitrogen decreases gradually and reaches the lowest value at the edge of wetting body,namely the peak wetting-value;
on the other hand,the content of NH+
4 -N is always lower than the content of NO3-N.The distribution features of NH+
4 -N and
NO-
3 -N along with the time are:the content of NO-
3 -N increases at first and reaches the maximum in the 5th day,and then decreases;
the content of NH+
4 -N is relatively low and decreases all the time,especially decreases rapidly in the 3rd day.The content of
NH+
4 -N in the 5th day is even lower than that before irrigation.

Keyword水肥一体化 滴灌 硝态氮 铵态氮
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8683
Collection水保所知识产出(1956---)
Affiliation1.中国科学院水利部水土保持研究所
2.西北农林科技大学水土保持研究所
3.中国科学院大学
First Author Affilication中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
王旭洋,范兴科. 水肥一体化滴灌条件下氮素在土壤中的 时空分布特征[J]. 节水灌溉,2016,2016(6):55-58.
APA 王旭洋,&范兴科.(2016).水肥一体化滴灌条件下氮素在土壤中的 时空分布特征.节水灌溉,2016(6),55-58.
MLA 王旭洋,et al."水肥一体化滴灌条件下氮素在土壤中的 时空分布特征".节水灌溉 2016.6(2016):55-58.
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