The format of this paper, which is in word version, allows for any editing of the p. M. P. 1 technology for the integrated planting of grapefruit trees, the deep flip expansion, and the periods during which the soil has been retrofitted, depending on the age of the tree. Young trees with no fruit are available throughout the year. It is usually done well before the peak of root growth, as the wounds heal easily after break. However, taking into account the season of supply of green or weed fertilizer, it is desirable that it take place in april. (b) the method of deep-floating fattening: usually using trenches or den enlargement, starting in the second year after planting. Close to the perimeter of the den, 50 cm wide, 60 cm deep, half-monthly ditch, which is equal to or close to the tree crown, be careful not to leave walls. The next deep decompression should be in the direction of cross-rotation until the entire garden is rehabilitated. The topsoil and the heart soil are piled separately when excavating, and then applied 30 cm to a layer of two layers of fat. 1520 kg per pig oxen or 23 kg per pie. Green fat, weeds, straw, and so on
2. The fatty, which is mixed with the topsoil, such as pigs, cattle dung or waffles, is placed slightly above the root, at a certain distance from the root system in order not to burn the root. The lime and phosphorus fertilizers are applied in layers, which are tightened and eventually cover the white soil up to about 20 centimetres above the ground, in order to avoid the deposit of water on the green fertilized lacuna. 2. Cultivation, cover-up, earth-bred (1) deep-drying and weeding in china: a prairie in the hills and hills, with the need for deep conversion, is once a year. The periods of deep tillage are generally carried out during the hibernation period at the beginning of the autumn and spring, and in areas where the winter has been frozen, the early spring is better. Deep tillage is carried by accident depths, with the advanced outer side shifting to the centre of the head of the tree, at a level that does not hurt more than 0. 5 cm. The depth of deep tillage should vary depending on the depth of the root system, usually by shallow tilling near the main backbone at a rate of 1020 cm, with a range of approximately 2530 cm deep, combined with lime, at 7080 kg/acre to adjust soil acidity. When the grapefruit is born in the long term, in general
3 thirty-five times. There is an inter-cropping crop between the young grapefruits, which can be combined with inter-cropping management. (ii) concealment: the cover-up of the tree plate of the young tea garden, the stabilization of the soil temperature, the reduction of soil moisture evaporation, the improvement of soil water content, the preservation of topsoil from rain, the preservation of soil sterility, the promotion of microbiological activity, the increase of soil organicity and the reduction of weeds is an effective increase in production. The cover should be taken from the village and, with the exception of green manure, the grass, the leaves, the cropwork, the grain shells or the wood crumbs are available. The thickness of the cover is usually 1015 cm. When the cover is over, it will be turned into soil and used as fertilizer for conversion. (3) planting soil: it usually takes place during the winter hours following the harvest of fruit, which is warm and cold during the winter and warm and wet during the summer. And it shall be grown in the summer, till then, and it shall not be too thick for it, nor shall it be for it to be buried. In winter, the soil must cover the roots of the neck, and when the temperature rises in the next spring, it must be removed on time
Four, in case of bad luck. Many grapefruit gardens use the ground as an effective measure of soil improvement. It's better if it's sanded, sanded, better. The wet ponds dug in the winter should be stacked and then crushed on the plate after drying. 3. Fertilization period (1) fertilization period for larvae: 13 years after planting the larvae, mainly through the cultivation of strong root groups, the promotion of fresh spasms, the formation of tree crowns as soon as possible, and early entry into the outcome period. Fertilisation should therefore be based on nitrogen fertilizer, with appropriate collaboration in phosphorus and potassium fertilizer. Because of their small and small roots, they are poorly distributed and weak in strength, they are governed by the principle of hard work. Quick-acting fertilization was applied once every 1520 days in march 38 to promote growth three times in spring, summer and autumn. It is applied 12 times, approximately 20 days before each release, and then once after the stub is cut and the blade turns green, the new stub accelerates the maturation. After mid-september, nitrogen fertilizers were generally not applied to prevent late autumn production. But in october, we're going to have to do it again
Fat, mainly decomposition, compost or dead cake, 2530 kg of pig and cow dung or 11. 5 kg of cake to increase the strength of the tree and its resistance. (2) periods of adult fertilisation: based on the biological activity of the gestational stage within one year, the following periods of fertilisation shall be managed: promotion of fertilisation: the fruit of the raisin is predominantly spring-based and fast-acting fertilisation before the chrysanthemum, which promotes the growth of spring-springs, delays the functioning of the old leaves and increases the nitrogen content of the leaves; and complete development of the flowers and the formation of fruit and fruit-bearing branches to grow the flowers. Usually in 2030 days before the bud. (b) there should be a distinction between old trees and young trees: the old trees are the ones that remove excessive amounts of flowers, increase the yield of nutrient branches, while the spring fertilisation can be delayed until the flowering season, so that the spring fertilisation can be used in summer and spring, and so on; young trees are given early to the early spring and are applied lightly in order to control excess nutrient branches and increase sit-in rates. Before the flower, nitrogen is the main source of co-operative potassium, phosphorus and fertilization
The volume represents about 20 per cent of total fertilization throughout the year. Pocket fats: as a result of the high volume of euphoria sprouts and the high consumption of tree nutrients at the time of fertilization, early fruit was often produced in mid-56 with insufficient nutrients, the first physico-feeding was followed by a quick-effect conservative fertilizer, dominated by compound fertilizers, and the collaborative application of co-fertilized farm fats had a steady effect on multiflower trees and old trees. This fertilisation requires proper visualization, mainly of potassium, phosphorus and collaboration of a positive quantity of nitrogen and magnesium. In general, older trees need to be applied appropriately, while younger trees are less or less so that they do not cause excesses and exacerbate the fallout. Fertilisation accounted for 5 per cent of total fertilization throughout the year. (b) fertilizers: when the physiology of the grapefruit ends, the fruit expands rapidly, the root causes are strong and the early fall is being pumped at this time, thus requiring a large supply of nutrients to satisfy the need for the bulge of the grapefruit and fresh sip. So, in mid-july, we're going to re-energize well-established organic fertilizers, which will contribute to the booming early autumn
7. Establish a good material base for nutrient splitting. Fertilisation is about 30 per cent of total fertilization throughout the year. (a) fertilizer harvesting: 710 days before or after the harvest, which has an important role to play in restoring tree positions, preserving leaves for the winter, promoting the flaying of flowers and overcoming the effects of age and age. This time, organic fertilizer was used in combination with calcium phosphate, potassium sulphate and bone powder. The fertilizer should be re-applied and applied early, followed by the timely application of the pre-cooked varieties and before the late-cooked varieties; the old trees should be multi-pushed and applied on time, while the younger trees should be less applied to contain the excessive growth of the buds. Fertilisation was 40 per cent of total fertilization throughout the year. The application of fertilizers should be determined on the basis of the results when the fertilisation of euphoria enters the fertile period. The normal acre produces 30003500 kg of euphoria, with 2228 kg of pure nitrogen, 1218 kg of phosphorus and 2228 kg of potassium, to satisfy the growth needs of the euphoria tree. The annual rate of nitrogen, phosphorus and potassium was 10:6:10。
8 for different varieties, however, the need for fertilizer varies. For example, in guangxi yong county, she is fertilized four times a year. The first fruit fertilizer, which was applied in mid-october, was typically 50 kg per pig oxen and fertiliser, 2. 5 kg per cake, 1 kg per calcium per phosphate and 1 kg per bone powder and 0. 75 kg per potassium chloride. 50 kilos of shit. For the second time, the flowers were fattening and applied in early february, with urea of 0. 75 kg or compound fat of 2 kg, calcium per phosphate of 0. 5 kg and human and animal urine of 50 kg. The third steady fruit fertilizer was applied late in april, with 0. 2 per cent urea plus 2 per cent calcium phosphate leachate used for external fatting. In the fourth case, in the month of july, fertilized bread was 2. 53 kg, bone powder 1. 25 kg, pig and cow dung and composting 50 kg each. The ratio of nitrogen, phosphorus and potassium is not 1:0. 64:0. 7. 5. Fertilisation method (1) soil fertilization method: the larvae can be fertilized in circular or plate form, while the adult tree uses a ditch, fire
9. Methods such as shooting ditches, caves and gardening. (2) extortion of fat: in addition to soil fertilisation, leaf fertilisation may be introduced, which is extracted through gas vents, with low fertility and rapid effects, but cannot be a substitute for soil fertilization. Fertilizer anniversary is possible, but priority is given to leaf-to-back spraying, which is good for each new colour change and fertilisation. During the summer high-temperature season, fatting outside the clear roots should be the best in the temperature 1824 before 10 a. M. And after 4 p. M. After dry dew. Concentrations of various fertilizers: urea, 0. 2. 5 per cent, urine, 5 per cent, calcium perphosphate leachate, 1 per cent, potassium phosphate, 0. 2 per cent, boron, 0. 1 per cent, 0. 3 per cent and 0. 2 per cent precipitated lime, potassium nitrate, 0. 3 per cent, zinc sulfate, 0. 1 per cent and 0. 1 per cent refined lime, zinc oxide, 0. 2 per cent, magnesium sulfate, 0. 4 per cent plus 0. 2 per cent prepared lime, magnesium nitrate, 0. 5 per cent, manganese sulfate, 0. 1 per cent plus precipitated lime, 0. 2 per cent ammonium sulfate and 0. 1 per cent iron citricate. (3) water drainage and irrigation in most areas of the yangtze river basin, which disappears in the winter and leaves the grapefruit susceptible to freezing, is an important measure against freezing leaves. The methods of irrigation are ditch irrigation, flood irrigation, plate irrigation, cave irrigation, irrigation, spraying, drip irrigation, etc., which can be used on condition. It is generally water-consuming and can damage soil structures and topsoil slabs that are not suitable for adoption. Spraying and dripping should be the best current method of irrigation。
