Overwintering 茬 cucumber how to do after the colonization

Recently, the author discovered that the cultivation and management measures of some vegetable farmers are not appropriate in the shed areas. It is common for overwintering and planting of cucumbers after planting. If the correct management measures are not adopted, the yield will be greatly affected.

One, cucumber plant leggy performance

The cucumber plants showed fine stems, long internodes, large and thin leaves, pale leaves, slender petiole and small angles with the stems, small and sharp crowns, and few pods.

Second, cause the cause of leggy

1, planting water did not foot. After the planting, the first water did not make enough water, and most of the greenhouses were filled with the second water. At this time, the cucumber's root melon has not yet sat, the plant has not yet been transformed mainly from vegetative growth to reproductive growth, early watering, will inevitably lead to excessive vegetative growth, occurrence of leggy.

2, ventilation and cooling are not timely, the temperature inside the shed is high. After planting the seedlings, the ventilation and cooling were not conducted in time, which caused the temperature in the shelter to be too high, especially the temperature at night did not fall down, resulting in leggy plants.

3, after watering, there is no timely cultivator loose soil. After watering, the soil has high humidity and not timely cultivating tillage, which will affect the permeability of the soil and the respiration of the roots, which is not conducive to the roots under the roots, thus affecting the development of the root system.

Third, the adverse effects of plant leggy

1. Root dysplasia: The plant's vegetative overgrowth, unbalanced growth between the shoot and the ground, resulting in small roots, shallow roots, and lack of large root groups.

2, affect the flowering, sitting melon: plant nutrient growth is too prosperous, will delay flowering, sitting melon, or stem fine flowers weak, stalk coarse melon less.

3, plant resistance to disease, reduced resistance: shallow root susceptible to disease. Due to its shallow root system, the water-absorption and absorption-absorbing ability of planters is relatively low. The dry matter accumulation in stems and leaves of plants is low, the concentration of cell solution is low, and the plants have strong internal deficiency, which reduces disease resistance and resistance. In particular, the cold resistance of greenhouse grown plants has decreased significantly.

4, the plant is susceptible to premature aging, reduce production: due to the former long-term plant growth, vegetative growth is too prosperous, will inevitably affect reproductive growth, affect product nutrition accumulation, resulting in premature plant failure, yield reduction.

IV. Management measures to be taken

1, colonization water poured without excess: the colonization of water has not been a small sorghum on it. Why does the colonization of many greenhouses in the current production do not make enough water? The reasons are: First, some did not adopt small sorghum cultivation; Second, although the cultivation of small sorghum was adopted, the height of sorghum was not enough.

2, after watering, it is necessary to disperse a period of time, and then cover the mulch: after planting irrigated, usually over 3-4 days, when the topsoil is slightly dry when shallow cultivator, the purpose is to dehumidify scab, reduce soil moisture, reduce compaction, Increasing the oxygen content of the soil is conducive to the respiration and growth of the roots. Under normal circumstances, the film can be covered in about 7 days, and the thick soil should be covered with plastic film after 13-14 days.

3, shallow 4-5 times cultivator: After pouring water after planting, the main management measures are shallow cultivator, to diligent, fine plowing. In the cultivating loose soil, one can cut off the soil capillary to avoid the moisture in the soil capillary rising to the surface layer, reduce the massive evaporation of water, and can reduce the air humidity in the shed; the second is to form a dry and wet soil environment, and promote deep rooting; Is to increase soil permeability, increase soil oxygen content, is conducive to the roots of the respiration and growth; Fourth, you can break the knot, combined cracks, can control the transpiration of groundwater to take away the heat, but also protect the insulation and cold seedlings. In general, through multiple cultivators, the ground temperature can be increased, soil permeability can be enhanced, soil moisture can be maintained, the growth environment of the root system can be improved, and root development can be promoted rapidly to prevent cold roots and roots from appearing, and to achieve deep rooting and vigorous flower bud differentiation. The purpose of roots is to stabilize.

4, to reduce the night temperature, widening the temperature difference between day and night: the appropriate temperature after colonization of cucumber in the 10 °C -30 °C, the temperature is too high, respiratory effects increase, the body running disorders, causing leggy, at the same time, will inhibit the growth of young fruit, so that Production declines. In the suitable temperature range, the larger day-night temperature difference than the small temperature difference control plant growth, strong growth potential, significantly increased early yield. Four-stage temperature management can be used. In the morning, it is the strongest stage of photosynthesis in the day. Temperature control is appropriate at 26°C to 30°C. After light is weakened in the afternoon, it is advisable to control the temperature at 20°C to 24°C in order to connect with the nighttime temperature. The first half of the night to promote the transport of photosynthetic products, the temperature is controlled at 15 °C -19 °C; the latter part of the night to inhibit breathing, reduce nutrient consumption, increase the accumulation of the body, the temperature is controlled at 10 °C -12 °C.

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