Seven bases for High yield selection of Spring sowing Maize

Corn can be sown several times a year. Spring corn is the season of the year when corn yields are higher. Scientific seed selection is an important link to ensure high yield of spring-sown maize. How scientific seed selection can be conducive to high yield of spring sowing corn? The key is to select seeds according to the following seven aspects: according to the height of terrain. Mountain temperature is high, it is appropriate to select late maturity varieties or middle and late maturity varieties with long growth period; flat land is suitable for middle and late maturity varieties; depression is suitable for middle and early maturity varieties. Select seeds according to soil fertility. High-yielding varieties that like fertilizer and water should be selected for plots with good soil fertility, and varieties with poor soil fertility should be selected for plots with poor soil fertility. Seed selection based on previous crop varieties. If the previous crop is soybean, the soil fertility is better, and the high-yield variety should be selected; if the previous crop of corn grows well and has a high yield, this variety can continue to be selected; if the previous crop of corn is infected with a certain disease, the variety susceptible to this disease should be avoided when selecting seeds. Seed selection is based on cultivation level. Farmers with relatively fine farming can choose varieties with high requirements for farming level; farmers with poor farming should choose varieties with lax requirements for farming. Select seeds according to disease severity. The prominent disease is maize rough dwarf, which is mainly related to soil. Denghai No. 9 is suitable for planting in the land with balanced soil nutrients and high maturity, and the plant grows healthily and can obtain high yield. Seed selection based on precipitation accumulated temperature. The general experience of estimating precipitation and accumulated temperature to select varieties is that the snowfall in winter last year is small, the winter is not cold, the rainfall in summer next year will be more, the accumulated temperature will not be high, and it is not recommended to plant varieties with long growth period in case the accumulated temperature is not enough to affect maturity. On the contrary, if the snowfall in winter last year is large, the winter is very cold, and the rainfall in summer next year is generally less, and the accumulated temperature is high. The drought resistance of varieties should be emphasized when selecting varieties, and varieties with long growth period can be planted. Lowland can be properly planted some late maturing varieties. Select seeds according to appearance package. Quality reliable seeds generally have the following appearance packaging characteristics: packaging bag once sealed, seed company name and detailed address and contact telephone number; seed label production date, purity, moisture, germination rate clear, seed shape, size and color are also neat and consistent.