From site selection to seedling management to teach you how to grow grapefruit

The cultivation of grapefruit trees in China has a long history, and it was recorded as early as the Zhou and Qin dynasties in BC. The leaves of grapefruit are like oranges and oranges, mostly oval or oval, and the surface of grapefruit is yellow and orange with irritating smell. The pulp is rich in vitamins, organic acids and minerals, which has the effects of relieving cough and resolving phlegm, moistening the lungs and clearing intestines, which is deeply loved by the people. Here, I would like to introduce the matters and methods that need to be paid attention to during the period from site selection to seedling management, hoping to provide some help to friends who have ideas about planting grapefruit.

I. selection of sites

The first step before sowing must be to choose the location of the nursery, the nursery should choose to the south or southeast, well ventilated and transparent, with a maximum slope of no more than 10 degrees. The soil layer is more than 20 cm, which is generally selected in sandy loam or sandy yellow loam with good water retention and drainage, convenient irrigation and medium soil fertility, and should have a certain resistance to wind damage and diseases and insect pests.

II. Land preparation

After the sowing nursery has been determined, before sowing, the nursery should deeply plough and dry the soil to make the soil fully weathered, the drainage ditch should be opened around the nursery to facilitate drainage and irrigation, and the border should be arranged in the east-west direction. Generally, the border width is 1.2m, the height is 15-20cm, the ditch width is 40cm, the border length depends on the topography, the border surface should be flat, the soil grains should be fine, grass fertilizer should be applied a few days before sowing, and farm manure is generally used per mu of land. Mix 150 kg of plant ash with topsoil before sowing.

Third, sowing seeds

The sowing time can be chosen to start sowing after the seeds are received between September and December, or you can choose to save the seeds for the following spring. When sowing, first open a horizontal trench on the border surface, the row spacing is 10 cm, and the amount of seeds per mu is about 15-18 kg. About 40, 000 seedlings can be produced, and about 10 cm of fine soil can be covered with fern grass, rice straw and other weeds. Then cover the border surface with other weeds such as fern grass and rice straw to moisturize the soil. In places where irrigation is convenient, "horse race water" can also be irrigated once to wet the ground. Pay attention to watering when drought, and often keep the nursery moist. Promote seed germination, uncover the grass after the seedlings are unearthed.

IV. Management of seedlings

After the seedlings are unearthed, the seedling bed should always be kept moist, but stagnant water should not be formed. when the seedlings grow two true leaves and the leaves change from light to dark green, they can begin to apply fertilizer, which is mainly applied thinly in the early stage, similar to "a small amount of food". Once every ten days to half a month, after six or seven consecutive applications, fertilizer can be fertilized according to the growth of seedlings, and the fertilizer is mainly nitrogen fertilizer such as human and animal feces and urine or ammonium sulfate. Appropriate application of plant ash or calcium superphosphate and other phosphorus and potassium fertilizer. Generally speaking, after a year of growth management, the seedlings can grow to 30-50 cm high. At this time, you can start planting directly or be used as a rootstock for grafted seedlings.

The above is the introduction of the initial seedling technology of grapefruit seedlings. It needs to be added that grapefruit trees are positive plants and need to be born in low-altitude areas with plenty of sunshine and a warm climate, as far north as Xinyang and Nanyang in Henan Province. Geographical factors should be considered before planting, and do not introduce them blindly.