Winter red pomelo grapefruit began to enter flower bud morphological differentiation and flower bud differentiation period. All kinds of winter tube technical measures must be grasped in a timely manner to promote strong trees and strong flowers in order to seize the harvest in the coming year. "Frostfall"-"Lingdong" after the application of good post-harvest fertilizer is particularly important for the recovery of the high-yielding pomelo plant. "Winter Solstice"-"Xiaohan" applied winter basal fertilizer (differentiated fat). In winter, because pomelo tree is in a semi-dormant state, the root activity is reduced, the temperature is low, and there is little rain, and the fertilizer is decomposed slowly. The fertilizer applied has less direct impact on the root system, and the principle of one-time fertilizer can be increased. Use acupuncture, furrow, etc.
Second, the spring is the early stage of grapefruit hair roots, Changchun shoots, long flower spikes, flowering, and fruiting knots. This period is the season when the spring is often rainy or rainy. During this period, the main method of fertilization is thin-fertilizer. The methods of fertilization were applied after the rain was fine, and the water and liquid were applied on dry days. In order not to affect the growth of the roots, especially to prevent the roots of teak ulcers, resulting in weak or dead grapefruit. It is also the main reason for preventing yellowing of new shoots after turning green.
Third, summer is the grapefruit hair roots, long summer shoots, young fruit and fruit enlargement period. This period is an important period of fertilization throughout the year, and it is also a key pest occurrence period. This period is typhoon and rainy seasons in summer. Fertilization methods must use thin-fertilizer treatment methods. It is best not to over-evaluate fertilization and acupuncture points and trenches. Shi et al. to prevent long-term heavy rain from fertilizing the ditch. Mountain paddy fields, plain fields, low-lying paddy fields and pomelo are more likely to use thin-fertilizers. The most important thing is to concentrate the fertilizer on grapefruit roots and reduce the loss of fertilizer. As a result of one-time heavy fertilizer, water in the hole or ditch will make the root of pomelo fester, so that the tree vigor will weaken until death. In the late autumn and early autumn and rainy season and before the great heat, 85% or more of the whole year's fertilizer application ends.
Fourth, autumn is the grapefruit hair roots, long autumn shoots, pomelo fruit, rapid expansion, late turn to the juice of the water and sugar accumulation of meat filling period, most of the years this year is the season of typhoon rain, pests and diseases the main period, this period grapefruit The main reason for the lack of fertilization is the supplement of winter, spring, and summer fertilization accounts for more than 85% of the whole year and soil fertility to promote fruit enlargement and fat filling, and it is also a cause of prevention of pomelo tree weakness and death. In the middle of autumn, the temperature of “white dew†and “equinox†has decreased, generally during the period of low rainfall, and 1-2 thin fertilizers can be supplemented appropriately to facilitate fruit filling and increase of sugar content. This is why flower buds are physiologically differentiated, robust, and flowering in the coming year. There is a "real foundation.
Vegetable Seeds are used in the production of vegetable seeds, divided into conventional and hybrid seeds.Vegetables that conventional types of vegetables to grow itself through natural laws of seeds, vegetables hybrid seeds (general hybrid F1 generation of hybrid) is by using different features of plants (male and female parent) for their pollination, change its characteristics.
First, many varieties and complex.In science and technology is the first productive force and science and technology oriented market sense, such as policy, scientific research institutions, experts and scholars engaged in the work of agricultural breeding have mushroomed, new achievements and new varieties are created.The resulting problems, a species and strains are many, character difference is small, removing impurity harder when breeding, varieties of authenticity and purity is difficult to guarantee;Second, in many scientific research units and experts and scholars of breeding race, south guo is inevitable the sham as the genuine, some traits instability, poor adaptability, or no market with a production value of species, strain, misleading, interfere with the normal order of seed production and operation.So for buying vegetable seeds, should be on the basis of reputation good place.Buy formal cultivated seeds.
Second, the seeds and the seeds are similar, strong concealment on production.A similar appearance.And both in plant and seed itself, the difference between conventional seeds is not very big.So on the choice is very difficult to identify.Thus caused the insufficient understanding of seed and hurt production.Especially the base vegetables with particularly can't careless.Vegetable Seeds
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