(I) Check and supplement seedlings in a timely manner. Immediately after corn emergence, the emergence of seedlings was checked, whether they were full seedlings or whether they were short of seedlings. Found lack of seedlings broken ridge timely replanting, planting. Before the trifoliate seedlings were soaked with water and seedlings were reseeded with watering, and after three leaves were planted with interplanting seedlings. In addition, the lack of seedlings can also leave two strains to remedy.
(b) Early seedlings and timely seedlings. When the seedlings grow to 3-4 leaves, timely removal of weak, white, yellow, disease, poor seedlings, especially the soil drought, the large amount of sowing, but also promptly early seedlings. When the seedlings grow to 5-6 leaves, the seedlings are planted according to the planned spacing and density, and the remaining seedlings are completely removed. When setting seedlings, the lines and fields can be kept denser. In the heavy land masses of the underground pests, in addition to the timely management of pests, the number of seedlings was increased and the time for seedling establishment was appropriately postponed. When the seedlings are kept in between, the removed seedlings must be cleared out of the field in time.
(3) Seedling early, deep-middle cultivating and promoting strong seedlings. Due to the developed corn roots and strong breathing, the cultivator should be deep in the rows, beside the seedlings, be fine between the plants, and avoid rooting. Normal seedlings 2-3 times, once cultivating between the seedlings, depth 5-6 cm; after the second seedling cultivating, depth 8-10 cm; before the jointing of the third cultivator, the depth of about 10 cm.
(d) seedlings to promote strong standing team. The seedlings are an effective technical measure to solve the contradiction between the growth of the ground and the underground, based on the characteristics of the maturation of the maize seedlings, and artificially controlled and promoted. It includes a set of measures to control watering, cultivating deep squats, and gentry drying roots, promoting root development to depth, shortening the internodes of the lower culm, decreasing the ear position, and enhancing lodging resistance. At the same time promote the panicle differentiation, effectively alleviate the contradiction between the ground and the underground, vegetative growth and reproductive growth, and lay the foundation for large-scale panicles. Corn seedlings should be managed flexibly according to variety, density, and soil fertility. Commonly, seedlings with dark green, fertilized, dense and full-bodied leaves should be seedlings; they should not be thin, thin, and weak. Therefore, there are "three and three non-stop" farms. That is, the black is not yellow, and the fat is not thin, and the wet is not dry. Seedlings should generally end before the jointing, the time is too short to be effective, too long affect the spike differentiation, the formation of "small old seedlings." After the seedlings are over, they should immediately top-dressing and watering to promote growth.
(e) Strengthen water and fertilizer management. For weak seedlings, seedlings, and supplementary seedlings, the seedlings must be topdressed in a timely manner, poured with eccentric water, promote their transformation, and grow evenly and long.
(six) control of underground pests. There are more underground pests during the seedling stage, such as cockroaches, wireworms, umbilical cocoons, and ground tigers. Toxic soil or poison valley should be promptly thrown in, and comprehensive measures should be taken to prevent and control the seedlings.
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