The nature of the soil for kiwifruit cultivation is different, and the water requirement is also different. It can be judged according to the maximum water holding capacity of the field (the water retention capacity of sandy soil is small, the loam is in the middle, and the clay is high).
Generally speaking, when the field water holding capacity of sand to clay is 25% to 35%, the soil will be a little dry when controlled by hand; when the maximum water holding capacity in the field is 60% to 80%, control the moisture by hand It can be dispersed, and the moisture content in the soil is the most suitable. When the soil water holding capacity of the kiwi field is below 50%, which is the same level in the range of 20 cm, irrigation is required.
The kiwi fruit planted on loam soil is controlled by hand, once it is controlled into a cluster, it will disperse as soon as it is loose; when planting kiwi fruit on a heavy soil, the soil is controlled by hand, and there are cracks when squeezing the soil after hand grasping, indicating the soil water holding capacity At about 50%, the leaves will not only wilt under the noon exposure, but will still wilt after the strong light, indicating that there is a shortage of water, and water must be irrigated.
Formulated when fertilizing is used properly
The ratio of top dressing and the amount of strong fruit fertilizer fertilization principles are generally combined application of medium nitrogen, low phosphorus and high potassium formula fertilizer and biological organic fertilizer. At this time, reducing the amount of nitrogen fertilizer can make the kiwi fruit color on schedule, enhance the degree of lignification of the branches, and promote the safe overwintering of the kiwi fruit trees. Appropriate increase in potassium fertilizer can promote photosynthesis. Namely: sugar conversion and transportation, increase fruit weight, promote fruit coloring, and improve kiwi fruit quality and storability; at the same time, it can thicken the branches, accelerate the growth and maturity of the branches, and enhance the anti-freezing ability of the kiwi tree.
There are two methods of fertilization in radial furrows: centering on the main trunk, fertilizing two-thirds of the kiwi canopy projection. Namely: dig 4 to 6 radial trenches with a width of 30 cm and a depth of 15-20 cm at a distance of 60 to 80 cm from the main pole, and mix the fertilizer and soil into the trench.
Hole application: dig a hole 15 cm deep and 30-40 cm in diameter under the crown of the kiwi fruit, 80-100 cm away from the main trunk, dig 2 to 3 holes on each side of each tree, and apply fertilizer. It should be noted that ****** do not spread or strip, and do not mechanically deep plough.
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