How to prevent the occurrence of celery physiological diseases

Celery often has physiological diseases such as heartburn, hollow, petiole cracking, and lack of boron during the growth process, which seriously affects the yield and quality of celery. In order to facilitate the identification and prevention of farmers, the following are introduced for reference.

First, the heartburn of heartburn celery is mostly caused by calcium deficiency. At the beginning of the heart, the leaf veins become brown and the leaf margin cells become necrotic and dark brown. It occurs when 11-12 true leaves are present, and it rarely occurs at the early stage of reproduction. This symptom occurs easily under conditions of high temperature, drought, and excessive fertilization. High temperature can speed up the growth rate, promote the excessive absorption of nitrogen, potassium, magnesium and other elements of plants, and affect the absorption of calcium; under drought conditions, due to the weakening of the absorption capacity of calcium in roots, it is easy to cause plant deficiencies. calcium.

To this end, we must first pay attention to avoid high-temperature drought, timely management of proper temperature; fertilizer application of nitrogen, potassium, magnesium and other appropriate amount. Once symptoms of heartburn occur, 0.5% calcium chloride or calcium nitrate solution can be applied to the foliage.

Second, hollow hollow celery is a physiological aging phenomenon. The site of occurrence is the petiole. It is the aging of the petiole and the communicating tissue of the petiole, the loss of viability of the cell fluid glial and the formation of gaps in the cell membrane. Mostly from the base of the petiole begins to extend upward. On the same plant, the outer leaves preceded the inner leaves and occurred earlier from the leaf base to the first. The hollow part of the petiole is white flocculent, hollow in the sandy soil, more progress, rapid progress; lack of fertilizer or late defertilization, soil drought or high temperature, too low are also frequent; excessive spraying Gibberella Suspension, freezing, or over-ripening of the product and long-term water loss can easily cause or cause hollow.

Preventive measures should be avoided in the sand too much soil cultivation; in addition to the application of base fertilizer, in the growth and development should be promptly topdressing, such as the discovery of leaf color fade appears de-fertilizer, 0.1% urea liquid fertilizer can be used for extra-root fertilizer. When treated with gibberellin, nitrogen fertilizer should be sprayed at the same time.

Third, the lack of boron deficiency celery boron deficiency symptoms showed abnormal petiole hypertrophy, shortening, and bending to the inside, the curved part of the inner side of the organization to drink, gradually cracking, petiole twisted and chapped. The order of occurrence is: the edges of the yo-yo leaves gradually turn brown inward, and finally the heart leaves become necrotic.

One of the causes of boron deficiency is due to the lack of boron in the soil; the other is that there are many other nutrients in the soil that inhibit the normal absorption of boron. In addition, boron deficiency can easily occur under conditions of high temperature and drought.

Preventive measures such as the lack of boron in the soil, can be applied 1 kg of borax per acre to supplement the deficiency of boron; after the symptoms of boron deficiency occur, foliar spray with 0.1%-0.3% borax aqueous solution.

Fourth, petiole cracking celery petiole cracking most of the performance of the base of the stem together with petiole cracking at the same time, not only affect the quality of goods, but the bacteria can easily be infected, the incidence of mildew.

The cause of petiole cracking is mostly caused by severe inhibition of growth and development under low temperature and drought conditions. In addition, due to the sudden high temperature and humidity, the water absorption of plants is too strong. Tissue watering can also happen.

Preventive measures Conduct normal temperature and humidity management, strengthen insulation measures; deepen the soil, apply more organic fertilizer, promote root growth and development, and enhance its ability to resist drought and low temperatures.

Light Color Halves Walnut Kernels

light color products ,halves, Yunnan origin. shelling by hands, good shape, sweet and crispy

Light Color Halves Walnut Kernels,Shelled Walnut Halves Light Color,Walnuts Halves Light Color,Walnuts Kernels Light Halves

Weishan Yuanxing Walnuts Co.,Ltd. , https://www.walnutsxxy.com