Type 1 garlic secondary growth
According to the secondary growth in garlic plant on site, can be divided into the following three types:
1.1 the outer secondary growth
Garlic outer leaves 1 to several axillary in initiation of bulbil, bulbil delay into dormancy and continue to divide and grow, and form a single or no flowers moss points clove of garlic, garlic clove of garlic or flowering moss points, results in the periphery of the garlic with some arrangement disordered cloves or small garlic, make whole garlic become deformed.This type of secondary growth largest influence on the quality of the goods.
1.2 the inner secondary growth
In garlic plants inner leaf axil, normal differentiation of bulbil delay into dormancy, bulbil peripheral protection Ye Jixu growth, from the mouth of the plant leaf sheath, the formation of multiple branching.Some branch develop into normal cloves;Some branch develop into a clove of garlic, there are more than a handful of clove of garlic also formed the moss.Mild lining type has a little influence on the appearance of secondary growth of garlic, serious when young garlic shoot shorten, moss weight is reduced, cloves arranged loosely, garlic top easy craze, formed by multiple disc normal appearance resembles a large cloves of garlic, are often chosen for garlic, but by a kind of disc after sowing garlic sprout sprout more strain, affect the yield and quality of garlic.
1.3 aerial bulb type secondary growth
Young garlic shoot involucre of aerial bulb delay into dormancy and continue to grow into a plant, even tiny young garlic shoot.In aerial bulb type secondary growth of plants, often make the shortening of the young garlic shoot, loss of commodity value, but not affect the garlic.The incidence of this type is generally low.
2 garlic occurred secondary growth
2.1 genetic variety
Garlic secondary growth type and severity is related to varieties of hereditary.There are classified into the three kinds of situations.It is only the inner type varieties, such as the time of the Soviet union red one garlic series of varieties.The second is the inner and outer the secondary growth varieties such as features of all can happen.Three is not occur secondary growth of varieties such as shaanxi NingJiangShan garlic, etc.
Garlic production areas to choose the local garlic varieties or introduce foreign varieties, in understanding the high yielding and commodity at the same time, should also be aware of second time growth, try to choose is not easy to occur secondary growth, especially difficult to breed type outer secondary growth.
Garlic type although mainly depends on the time of varieties of hereditary, but there are differences in the genetic stability between different varieties.only commonly happen outer lining type secondary growth, not the growth of the secondary varieties of genetic, the more stable under the condition of the field cultivation, in different years, all can maintain its genetic characteristics.And the inner and outer secondary growth all can happen varieties, genetic stable enough, sometimes both at the same time, sometimes only the outer type secondary growth or only lining type secondary growth.The severity of the secondary growth and cultivation techniques and climatic condition has close relationship.
2.2 during the garlic kind of storage temperature and humidity
During the storage of garlic temperature has significant effect on the secondary growth, low temperature has a promoting effect, but there are differences in degree of different varieties to low temperature reaction.
Garlic after harvest, storage at room temperature, not easy to induce secondary growth during the period of storage at low temperature and cold conditions.But after autumn sowing, from seedling stage to bud, bulbil differentiation development has to deal with low temperature and cold conditions, so the garlic kind of making low temperature treatment, even if you don't have the possibility of secondary growth.
Garlic kind of storage facilities in addition to the temperature have effect on the secondary growth, also has effect on the air relative humidity, and there are interactions between the temperature and air relative humidity.In order to reduce the occurrence of secondary growth, not only to avoid low temperature during the garlic kind of storage, and avoid the air relative humidity above 75%.
2.3 seeding time
Early seeding time is one of the important causes of secondary growth.According to many years of investigation and study found that the seeding time and the relationship between the secondary growth because of the variety, kind of degree of dormancy, garlic garlic kind of storage environment, seeding emergence vary speed and soil moisture, and seeding time morning and evening to the same species of different types of secondary growth is not the same.
Prone to the growth of the secondary lining type varieties, such as features, sowing date sooner or later, the external layer type have no obvious effect on the occurrence of secondary growth, garlic kind of if through a cold processing and planting early, will promote the growth of the outer and inner secondary.
Seeding time on the secondary growth is related to soil moisture, the effects of seeding time and soil moisture external layer model has a little influence on the occurrence of secondary growth, but have an effect on lining type secondary the happening of the growth.Sowing date no matter sooner or later, high soil moisture, soil relative water content of 90%), the inner layer type
