Crops ›› 2020, Vol. 36 ›› Issue (6): 175-179.doi: 10.16035/j.issn.1001-7283.2020.06.026

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Application of the New Negative Pressure Irrigation Technology for Accurate Regulation Farmland Soil Moisture

Zhao Jun1(), Sun Mingyue2, Gao Xiang3, Zhao Chengjuan4, Cui Siping1, Zhou Baoyuan2, Guo Dong5, Ma Wei2()   

  1. 1Shijiazhuang Yikangnong Technology Development Company, Shijiazhuang 050000, Hebei, China
    2Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and Ecology,Ministry of Agriculture and Rural Affairs, Beijing 100081, China
    3Hebei Academy of Agriculture and Forestry, Shijiazhuang 050051, Hebei, China
    4Hebei Yishou Pharmaceutical Co., Ltd, Shijiazhuang 050000, Hebei, China
    5College of Agriculture, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
  • Received:2020-04-07 Revised:2020-05-20 Online:2020-12-15 Published:2020-12-09
  • Contact: Ma Wei E-mail:bjyknk@163.com;mawei02@caas.cn

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Abstract:

A new type of negative pressure infiltration irrigation facilities is applied to solve the water-saving micro-irrigation technology. The new system transforms the conventional annular pipe water conveyance into a straight one-way water, through the control on metering tank structure and voltage regulator, continuous automatic access to plant to water was realized, that changed the traditional concept of intermittent irrigation and improved irrigation precision and automation degree and improved the water use efficiecy significantly at the same time. Crop water demand and soil water balance with accurate water supply was realized, efficient and accurate use of water was promoted. The advantages of saving water, saving energy, protecting agricultural ecological environment, protecting land and other agricultural natural resources of negative pressure automatic recharge irrigation, precision of the soil water content and control continuously was implemented. Modern agricultural technology came true that saving labour, labour, scale, high efficiency and high technology. The irrigation concept of traditional irrigation was subverted. Instead of artificial mechanical water supplying, irrigation requirement is controlled by real-time equilibrium of soil water potential automatically, in real time, and scientifically with a wide range of development prospects.

Key words: Negative pressure infiltration irrigation technology, Water use efficiency, Precision control, Water-saving irrigation

Fig.1

Annular pipe water transport structure"

Fig.2

Straight pipeline water delivery structure"

Fig.3

Controlling metering tank"

Fig.4

Voltage regulator"

Fig.5

Combined pressure reducer"

Fig.6

Schematic diagram of seepage pipe distribution"

Fig.7

Schematic diagram of negative pressure infiltration irrigation system"

Fig.8

The relationship between pressure and soil water content"

Fig.9

The diurnal variation of irrigation rate"

Table 1

Water supply volume of negative pressure infiltration and flooding irrigation"

灌溉日期
Irrigation date		 负压温室用水量
Water consumption of negative pressure greenhouse (m3)		 对照温室用水量
Control greenhouse water consumption (m3)		 说明
Explain
2018-08-03 0 15 1.负压室温时阶段性水的总和,即从上一行时期到本行时期的总
用水量。
2.负压比对照温室少用水28m3,节约用水37.8%。
2018-09-24 9 12
2018-10-13 7 12
2018-11-04 10 12
2018-11-25 9 12
2018-12-15 7 11
2018-12-29 4 0
合计Total 46 74
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