Detailed Explanation of Key Points of Water-Saving Irrigation Techniques for Citrus Planting

1. Straw mulching Straw mulching is a water-saving technique with abundant resources and obvious benefits, and it also has notable characteristics such as improving the soil and increasing fertility, conserving soil and water, and increasing yield. Cut the weeds in the citrus orchard, use the weed resources on the terrace walls, spread them in the tree, and then cover them with a thin layer of soil, which has a significant effect on reducing soil evaporation. After mulching with straw, pay attention to fire prevention.

2. Improve irrigation methods Most citrus orchards use flood irrigation, which often causes slow water infiltration due to soil compaction, and because surface runoff is serious and evaporation is large, irrigation efficiency is seriously affected. In light of the terrain and water source conditions of the citrus orchards in our district, the irrigation techniques for surface irrigation should be improved, and water-saving irrigation methods should be vigorously promoted.

1. Furrow irrigation: Furrow irrigation is a relatively advanced surface irrigation technique, saving 1/3 of water compared with border irrigation. In addition, surface evaporation after furrow irrigation is also much less than after border irrigation. The method is: clear the large furrows between citrus tree rows, open ring-shaped furrows along the drip line of the tree canopy, let water flow from the large furrows into the ring-shaped furrows, and soak and irrigate each tree one by one. Hilly terraced land can use the back furrows to convey water. After irrigation, soil should be covered and loosened in a timely manner to reduce surface evaporation.

2. Ground hole seepage irrigation method: Around the citrus tree, dig 3-5 holes, with a diameter of 15-20CM and a depth of 60-80CM, then insert fine branches or rice straw into the holes. When irrigating, pour water into the ground holes. This method can not only quickly make water seep into the citrus roots, but also save water compared with flood irrigation, and can also reduce or avoid fruit cracking, leaf drop, and fruit drop caused by drastic changes in soil and tree water status under flood irrigation.

3. Spray drought-resistant agents Among chemical water-saving agents, fulvic acid is a multi-functional anti-transpirant that regulates plant growth. After spraying on the canopy, it can narrow the degree of stomatal opening and inhibit leaf transpiration; increase chlorophyll content and enhance photosynthetic capacity; promote root activity and accelerate absorption and transport; slow down soil moisture consumption and improve plant water status. One spraying is effective for as long as 12-20 days. You can choose Guodasheng 1500-2000 times solution or Handilong 1000 times solution, and spray the canopy before 10 a.m. and after 4 p.m., once every about 10 days, for 2-3 consecutive sprayings.

4. Ditch and canal water storage For citrus orchards in hilly and mountainous areas, promptly seal both ends of the inner terrace ditches, make full use of showers and thunderstorms to store water, and improve the soil water-holding rate of the citrus orchard.