1. Drip irrigation did not achieve the expected water saving effect

Needless to say, the original intention of domestic governments and users to adopt drip irrigation is to see that this technology has significant water-saving effects. Compared with flood irrigation, the literature reports that drip irrigation can save 50%-80% of water, and the water consumption of 1 acre flood irrigation can meet 2-4 acres of drip irrigation water. Drip irrigation effectively avoids loss of water delivery process and leakage loss, and reduces surface evaporation and runoff losses. In the dry areas, the significance of promoting drip irrigation is self-evident.

However, the reality of low water prices has weakened the water-saving awareness at the grassroots level, and the management of the water is not well saved. The water-saving rate of the drip irrigation of the existing projects has not reached the water-saving effect of the design. The water is only about 50%, and some are only 20-30% lower, and its water saving potential is worth exploring. Many places have spent a lot of money to build drip irrigation projects, but they have not seen the expected water-saving effects and achievements, and they still repeat the dilemma of water shortage.

2. Pursuit of low cost reduces the function and quality of drip irrigation

Although the localization of drip irrigation equipment has accelerated in recent years, the cost of drip irrigation has dropped to about 500 yuan, but it is still higher than other irrigation technologies. Because rural users are not aware of the investment in drip irrigation projects, the state’s support funds are limited, and the local government’s supporting funds are not in place, resulting in the general shortage of funds for drip irrigation projects. In many places, there has been a blind pursuit of low cost.

On the one hand, various raw materials continue to increase prices, on the other hand, the owners are desperately trying to lower the project cost. The result can only be to simplify the configuration of drip irrigation systems, select low-grade pipelines, and reduce the quality of construction, resulting in incomplete system functions. Two-head repair. Drip irrigation design must be scientific and reasonable, and practical and systematic.

In addition to reasonable layout of drip irrigation pipe, dripper and other emitters, it should also be equipped with equipment such as filtration, fertilization, pressure regulation control and monitoring. It is absolutely impossible to reduce or simplify equipment links to save investment, and it is impossible to make the hard-working projects become Decoration.

3, ultra-small planting methods limit the effective use of drip irrigation

At present, there are three main types of drip irrigation users, one is state-owned or collective farms; the second is the emerging agricultural stock company; the third is the rural greenhouse greenhouse growers and fruit growers. The farm and agricultural stock companies are conducive to unified management, the rotation irrigation system is guaranteed, and the drip irrigation effect is outstanding.

However, the large-scale decentralized farmers themselves are small in size, difficult to form, difficult to coordinate with each other, and there are many difficulties in promoting drip irrigation. The rural original organic wells are basically arranged according to pipe irrigation or canal irrigation, so that one household directly engages in drip irrigation without basic water supply supporting conditions.

 A small number of farmers engaged in drip irrigation is prone to large horse-drawn cars, saving water and saving electricity, resulting in increased power consumption per unit area. In terms of cost, farmers are more concerned about the amount of electricity consumed and are not too concerned about the amount of water saved.

4. The contradiction between drip irrigation and cultivation mode reduces the annual utilization rate of drip irrigation

It is increasingly found that due to the difficulty in adjusting the spacing of drip irrigation, its scope of use is being constrained by the cultivation mode. Drip irrigation in greenhouses is mainly suitable for tomato, cucumber and other vegetables. Drip irrigation pipes are mostly arranged according to the spacing of these crops. When densely planted rapeseed, Chinese cabbage, celery or seedlings, the distance between drip irrigation pipes is forced to narrow, resulting in more tube volume and higher cost. It is not convenient to use, and the user cannot afford it. In particular, after changing the line spacing and the line direction, the row spacing and direction of the drip irrigation pipe must also change accordingly. It is difficult to make drip irrigation-planting adapt to each other and it is very passive.

The farmer’s family has one or two greenhouse greenhouses, which are small in size, self-operated, planting crops and miscellaneous, which greatly restricts the effective operation of the system and the enthusiasm of purchasing drip irrigation equipment. Frequent drip irrigation pipes and drip irrigation pipes that are idle on the side are often seen in rural greenhouses. The user reports that drip irrigation is a good technique, but it is too cumbersome to use. Generally, only one crop can be used, and the utilization rate is not high.

5, lack of technical guidance, affecting drip irrigation effect

Because drip irrigation is a new water-saving technology, it emphasizes less irrigation and irrigation. Compared with traditional irrigation methods, when different crops should be filled with water, how long it takes to fill a pot, how to drip fertilization, farmers can not fully understand and Accurately master the essentials of operation. At the same time, local agricultural technology promotion departments also generally lack knowledge about drip irrigation, and it is difficult to give farmers correct and timely guidance.

Drip irrigation manufacturers and contractors mostly focus on equipment installation, ignoring the technical guidance and training of users in the later period, causing the disconnection between construction and use, which makes the role of drip irrigation not fully exerted, which is regrettable. It is necessary to explore and form a scientific and effective local drip irrigation system to truly increase production and increase income, and save water and energy, so that users can effectively obtain the benefits brought by drip irrigation.

6, lack of maintenance, affecting the operation of drip irrigation system

At present, the phenomenon of heavy construction and light management is widespread in the promotion of drip irrigation. Once the construction project has completed the acceptance check, it will be all the best, and it will lack the necessary funds to establish the corresponding maintenance management support system. The lack of necessary maintenance inspection during the use process will easily leave hidden dangers.

When the pipe network is damaged or the equipment is faulty, the user either does not know how to repair it, or the local can not buy equipment for maintenance and replacement, or has no money to buy at all, and can not repair in time. It is not uncommon to see the entire system being deactivated or even scrapped due to damage to local pipe fittings. Of course, the quality of drip irrigation equipment is currently uneven, and some equipment simply fails to meet manufacturing standards, which also increases the difficulty of maintenance and repair.

7, Drip irrigation system clogging

The drip irrigation channel diameter is generally less than 1mm, and anti-clogging has always been one of the main difficulties faced by drip irrigation. The dripper blockage is mainly caused by suspended solids (sand and impurities), dissolved salts (mainly carbonates), algae organic matter and the like. At present, there are few types of filters on the market, and the specifications are incomplete. Even if the filter is matched, it mainly solves the physical blockage such as sediment, and the biological blockage and chemical blockage solve the lack of tricks.

The investigation found that some engineering designs have simplified the filter configuration, and the filtering function is not strong; some users have insufficient understanding of the filter function and privately cancel the filter element of the mesh or laminated filter. According to the investigation, one-third of the existing scrap drip irrigation projects have filtered out the problem. In addition, at present, there are few fertilizers suitable for drip irrigation, and most of the fertilizers have poor solubility, which is also a cause of clogging problems in drip irrigation.

8. Ignore the promotion and application of drip irrigation technology according to local conditions

In reality, one says that drip irrigation is the most water-saving. Some governments or policy makers say that drip irrigation is the best and excludes other technologies. If you engage in me, it will lead to the blindness of some drip irrigation projects. In fact, drip irrigation itself is limited in many occasions. For example, in greenhouses, leafy vegetables are more suitable for micro-spraying; in some orchards with large plant spacing, small tube outflow or micro-spray may be better; farmers scattered in the plot Although planting and tube irrigation methods are extensive, they can be easily managed and coordinated, and farmers are welcome.

The characteristics of drip irrigation are water saving, small flow, long running time, cumbersome irrigation system, improper filtering of the dripper, clogging, and difficult to maintain and manage. These characteristics should meet the actual acceptance level of farmers. Inappropriate, other forms of irrigation should be recommended. Can not be established for the project, regardless of the suitability is not suitable, all crops are installed with drip irrigation, the results can be imagined. At the same time, we should actively find ways to explore the cultivation mode suitable for drip irrigation and agronomy.

Baoding Anyou Industry Co.,Ltd
www.anyouirrigation.com