First, see the growth period According to the cropping system choice, in the middle and southern part of Hebei Province, if the wheat is interplanted 7 to 10 days before harvest, the mid-maturing variety with a breeding period of 95-105 days should be appropriate; In order to select the medium-early maturing varieties, the growth period of 90-95 days is appropriate.
Second, considering the adaptability of the varieties of biological characteristics and morphological characteristics consistent with the local environmental conditions and production conditions, and have resistance to fertilizer, disease resistance, insect resistance, lodging resistance and other excellent characteristics of hybrids. For new varieties that have not been planted in the local area, a small amount of trials should be conducted first to avoid “acclimatizationâ€.
Third, according to the purpose of selecting varieties of grain type mainly to consider the grain yield of corn; grain and feed type should consider both the grain yield but also consider the stem and leaf yield, to plant tall, individual species of large biomass; fresh corn to consider corn The size of the stick and the high sugar content of the grain, high viscosity.
Fourth, the selection of high-purity varieties with high purity is one of the important factors for increasing production. According to the test, the purity of corn seeds is reduced by 1%, and the yield per mu is reduced by about 16.05 kg.
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