What are the precautions for hilling scallions? These points you need to know
During the cultivation of scallions, proper hilling is very important. It can increase the length of the white stalk, prevent lodging and bending, and at the same time greatly improve the taste and quality of scallions, enhancing their value. Hilling is an important measure for softening the leaf sheaths, preventing lodging, and improving the yield and quality of the white stalk. Cultivation and hilling must be carried out during the white stalk...
During the cultivation of scallions, proper hilling is very important. It can increase the length of the white stalk, prevent lodging and bending, and at the same time greatly improve the taste and quality of scallions, enhancing their value. Hilling is an important measure for softening the leaf sheaths, preventing lodging, and improving the yield and quality of the white stalk. Cultivation and hilling must be carried out during the white stalk formation period, otherwise it can easily cause rot of the roots and plants. Hilling should be gradually thickened according to the age of the seedlings, but if hilling is done improperly, it can cause scallion root burn, bending, and other problems. The precautions for hilling scallions are introduced as follows:
I. Hilling time. During the entire growth process of scallions, hilling is generally carried out 3 times. The first is called "small hilling", with the hilling thickness controlled at about 5 cm. Hilling can only be carried out when the scallions have grown to 30 cm; it must not be done too early, otherwise it can cause slow growth and bending of the scallions; hilling should preferably be done in the afternoon, because the leaves are tender, otherwise it can easily cause leaf damage. When the scallions have grown to 40 to 45 cm, a second hilling should be carried out, with the hilling thickness controlled at about 10 cm. The last hilling is about 20 days before harvest. In order to improve the quality and taste of the white stalk, the hilling thickness should be controlled at about 10 cm. Attention should be paid to the season when hilling; hilling must not be done in high-temperature seasons, otherwise the false stem buried too deep in the soil can easily rot.
II. Reasonable topdressing. When the scallions have grown to 30 cm and the white stalk has formed, a balanced compound fertilizer (for example, 15-15-15) at 25 jin can be applied together with 150 jin of soybean meal organic fertilizer to promote deep root growth and meet the needs of the scallions' early growth. When the scallions have grown to 40-45 cm, topdressing should mainly be nitrogen and potassium fertilizers; a 15-5-20 high-nitrogen high-potassium type can be chosen to promote the growth of the false stem and leaves, together with 250 jin of soybean meal organic fertilizer. About 20 days before harvest, 50 jin of calcium nitrate can be broadcast, and no more nitrogen fertilizer should be added in this topdressing, otherwise it can easily cause the white stalk of the scallions to become soft and taste poor.
III. Hilling method. The width of soil taken should not be too wide; take soil from the middle of the row, and the width of soil taken should not exceed one third of the row spacing, nor should it be too deep, so as not to damage the roots; after hilling, the soil should be patted firm to prevent it from being washed away by rain or collapsing when watered; hilling is not suitable when the soil is too dry or too wet; the false stem of the scallions should be kept straight, and hilling should not be too deep, at most burying up to the leaf sheath, otherwise it can easily cause the white stalk to bend. Also, do not hill too deep at one time, otherwise if the functional leaves themselves are buried, it can easily cause leaf rot. The thickness of each hilling is 3-4 cm, hilling the soil up to the boundary between the leaf sheath and the leaf blade, that is, only bury the leaf sheath, not the leaf blades.
IV. Number of hillings. The number of hillings should not be too many. Frequent hilling not only increases the workload, but also inevitably damages roots and leaves, affecting the growth accumulation of scallions.