Longan fertilization considerations

Whether the new planting dragon eye seedlings can survive, whether it can be born early and fast, and achieve early harvest and high yield, the key lies in management. The following aspects should be done:

1. Covering the tree tray with new planting longan covering tree tray, it can not only stabilize soil temperature and reduce water evaporation, but also keep the soil in the tree tray moist, and reduce the loss of topsoil , which is beneficial to the root system to absorb nutrients and promote the early growth of seedlings. Seedlings should be quickly covered with rice straw or mountain grass.

Second, scientific fertilization fertilize newly planted longan principle is the first year: the first shoots are generally not mature before fertilization, let it mature leaf leaven topping spraying immediately, since each new shoot from the second shoot The sprayed surface fertilizer is applied twice and the soil is fertilized once. That is, from the second new shoot, each time the new shoots are cooked, the foliar fertilizer is sprayed with the topping , and the second foliar fertilizer is sprayed when the new leaflets are fully stretched , and the lower part is combined with the lower part. Fertilize the soil once. Foliar available KOMIX 500 times (or 6,000 times napin, a clear agricultural 200 times, Green No. 1 per packet Fenway watered 20 kg), dipotassium hydrogen phosphate, 0.2%, urea 0.2%, magnesium sulfate 0.2 % mixed spray. Soil fertilization can be made from human excrement or chicken manure and peanut bran to make water fertilizer ( concentration 20 % ~ 30 % ) or 0.5 % urea aqueous solution under the canopy drip line ditching and drenching.

Third, it should not blind longan crop species due to relatively tall adult tree planting specifications so relatively sparse, after planting the first two years in order to improve land utilization rate, generally between crops, should be limited to dwarf the annual crop species Such as peanuts, soybeans, etc., and about 1 meter away from the tree tray , cut between high-stalk crops such as corn, sugar cane and cassava.

Fourth, pay attention to drain the water in normal growth and development if the new plant longan flat, dry land, paddy fields, should be based on different terrain, carefully open good drainage ditch, so as not to encounter heavy rain or continuous rain caused water soak the root, seedling of .

Fifth, timely pest infestation of newly planted longan major diseases ghosts broom disease, anthracnose and leaf spot, in which there is not yet a ghost broom disease prevention and treatment effects of drugs, only with manual removal; anthracnose, leaf spot common 600 times of copper oxychloride , 800 times of carbendazim, 600 times of thiophanate and 500 times of bacterial frost manganese zinc . The main insect pests of Xinzhi Longan include Litchi scorpion, striated moth, chafer, white moth, longan horn scorpion, beetle and black and white ant. The drug control can be used up to 1000 to 1200 times. 1000 to 1500 times, 1000 times of insecticidal king, etc. When the second spray pest prevention, in principle, be spraying twice per shoot, i.e., when the first ejection buds just germinating shoots, it shoots another 10 to 15 days the leaflets fully extended significant red Times. Each time you can choose to use two kinds of drugs (insecticides, anti-diseases), and spray them in the rain within 12 hours after spraying.

Sixth, the timely stay shoots topping newly planted seedlings if relatively prosperous and strong normal water management, the latter is generally about 30 days between its upper tip buds began to sprout several sections, if only one trunk, you can stay 3 to 4 Buds (fixed shoots only 2 to 3 ), the rest are erased; if there are more than 2 branches, each branch leaves 2 shoots. If the new shoots grow stronger ( 20 cm in old maturity and 6 tarots or more), they can be topped when they are ripe. If they are not strong enough, they will wait until the second new shoot is ripe. Topping. In principle, each time the tip is once cooked, it will pick up the heart in time, leaving only 2 shoot buds, each of which only leaves 20 to 25 cm.