基于土壤吸力的主动式土壤水分平稳供应装置

孙 浩; 吕谋超; 黄修桥; 贾艳辉; 宗 洁; 杨慎骄; 刘 杨; 孙秀路

引用本文:	孙浩,吕谋超,黄修桥,等.基于土壤吸力的主动式土壤水分平稳供应装置[J].灌溉排水学报,2018,37(3):84-89.
	SUN Hao,LYU Mouchao,HUANG Xiuqiao,et al.基于土壤吸力的主动式土壤水分平稳供应装置[J].灌溉排水学报,2018,37(3):84-89.

【打印本页】【下载PDF全文】【查看/发表评论】【EndNote】【RefMan】【BibTex】

←前一篇|后一篇→

过刊浏览高级检索

本文已被：浏览 2149次下载 2343次	码上扫一扫！
分享到：微信更多字体:加大+\|默认\|缩小-
基于土壤吸力的主动式土壤水分平稳供应装置
孙浩，吕谋超，黄修桥，贾艳辉，宗洁，杨慎骄，刘杨，孙秀路
中国农业科学院农田灌溉研究所，河南新乡 453002；河南省节水农业重点实验室，河南新乡 453002

摘要:

【目的】测试新研发的作物主动式土壤水分平稳供应装置性能。【方法】设置了不同控压水平的土槽试验，测定和分析了该装置的控制负压能力和土壤湿润锋运移特性。【结果】①该装置可通过调整负压控制装置的数量和控压粗管内水柱高度将土壤负压控制在目标值附近，在-15 kPa以内的控制压力下，负压变幅极小。②该装置供水条件下，土壤水分的横向运移要强于垂向运移，但土壤湿润范围随负压控制装置数量的增多而减小；土壤湿润锋横向推进距离与灌水历时呈很好的幂函数关系，且随着负压控制装置数量的增多，土壤水分横向运移速度变慢。【结论】该装置可以实现对水分的连续自动获取，有望用于作物灌溉之中。

关键词: 土壤吸力；负压灌溉；负压控制装置；土壤湿润锋

DOI：10.13522/j.cnki.ggps.2017.0617

分类号:

基金项目:

Active Soil Moisture Supply Device Based on Soil Suction and Its Performance

SUN Hao, LYU Mouchao, HUANG Xiuqiao, JIA Yanhui, ZONG Jie, YANG Shenjiao, LIU Yang, SUN Xiulu

Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China； Key Laboratory of Water-saving Agriculture of Henan Province, Xinxiang 453002, China

Abstract:

【Objective】 Based on the soil suction, a new type of soil moisture supply device, in which crops play the active role, was developed and its performance need to be clear. 【Method】 In this paper, the soil-tank test with different control pressure levels was set up, and the control negative pressure and soil wetting front migration were measured. 【Result】 ①The device could control the soil pressure in the vicinity of the target value by adjusting the number of negative pressure control device and the water column height in the thick water pipe. The negative pressure amplitude was very small within the control pressure of -15 kPa. ②Supplying water with this device, the lateral movement of soil moisture was stronger than that of vertical migration, but the soil wetting range decreased with the increase of the number of negative pressure control devices. The lateral wetting distance of soil had a good power function to irrigation duration, and with the increase of the number of negative pressure control device, the lateral migration speed of soil moisture slowed down. 【Conclusion】 The device can achieve continuous acquisition of moisture automatically, and may be expected to be used for crop irrigation.

Key words: soil suction; negative pressure irrigation; negative pressure control device; soil wetting front