Nine years of drought in our province is a severe water shortage in our country. Studies have shown that crop varieties contribute between 23% and 25% to increased production and water saving in agriculture. Especially in drought and water shortage conditions, the drought-resistant and drought-tolerant crop varieties contribute more than 30% of the increase in yield. Under the same management conditions, drought-resistant and water-saving crops can be used to water less than non-drought-saving water, saving more than 30% of irrigation water. In view of the current situation of water shortage in our province, water conservation and drought resistance identification and screening of maize varieties cultivated by different breeding units in recent years were conducted, and some of the water-saving maize varieties that have been approved were selected and can be promoted in suitable regions.
1. Hengdan 6272. The dryland cultivation of Hebei Academy of Agricultural Sciences was selected. In artificially simulated drought shed and field natural drought conditions, the drought resistance index was 1.143 and 1.056, respectively. The drought resistance evaluation index of corn varieties in Hebei Province was a first-class drought-resistant variety. Seedling sheath purple. The plant type is compact, the plant height is 261 cm, the ear height is 126 cm, the number of leaves of the whole plant is 22, and the growth period is about 105 days. Tassels branching 12-16, anthers yellow, filaments purple. Ear-shaped tube, white cob, ear length 16.5 centimeters, ear rows 14 lines, 0.4 centimeters bald. The grain is yellow, half-toothed, and the grain weight is 339 grams. The seed rate is 86.6%.
Appropriate to promote the region: Hebei summer planting area.
2. Xianyu 335. The United States Pioneer Company selected breeding, in the artificial simulation drought shed and the field of natural drought in two environments, the drought resistance index was 1.041 and 1.003, Hebei Province, corn drought resistance evaluation criteria for the first-class drought-resistant varieties. In the Huanghuaihai region, the growth period was 98 days, which was 5-7 days earlier than the control Nongda 108. The seedlings have purple sheaths, green leaves, and green leaves. The plant type is compact, the plant height is 286 centimeters, the ear height is 103 centimeters, and the number of whole plant leaves is about 19 pieces. Pollen pink, glume green, filigree purplish red, ear-tubular, spike 18.5 cm long, 18.8 rows per ear, cob red, grain yellow, horse tooth shape, semi-rigid, 34.3 grams of grain weight.
Appropriate to promote the region: Hebei summer planting area.
3. Nonghua 101. Beijing Golden Nonghua Seed Industry Science and Technology Co., Ltd. was selected for breeding. Under artificially simulated drought sheds and field natural drought conditions, the drought resistance index was 1.043 and 1.343, respectively, and drought resistance evaluation criteria for maize cultivars in Hebei Province were first-order drought-resistant varieties. In the Huang-Huai-Hai area, it has emerged and matured for 100 days, which is equivalent to Zhengdan 958. The seedlings have light purple sheaths, green leaves, light purple leaves, light purple anthers, and pale purple glume. Compact plant type, plant height 296 cm, ear height 101 cm, 20-21 adult plant leaves. The filaments are light purple, and the ear is long and tubular. The ear length is 18 cm. The number of ear rows is 16-18 rows. The cob is red, the grain is yellow, the shape of the horse is toothed, and the grain weight is 36.7 g.
Appropriate to promote the region: Beijing, Tianjin, northern Hebei, Hebei, central and southern sowing planting, pay attention to the prevention of lodging (fold).
4. Zhongke 4. Beijing Zhongke Huatai Science and Technology Co., Ltd. and Henan Ketai Seed Industry Co., Ltd. jointly selected and bred, under the artificially simulated drought shed and field natural drought conditions, the drought resistance index was 1.030 and 1.032 respectively, and the corn drought resistance evaluation standard in Hebei Province. As a drought-resistant varieties. Seedling sheath light purple, semi-compact plant type, plant height 260-270 cm, ear height 100-104 cm, adult plant leaves green, purple rim, leaf number 20-21; filament pale pink, glumes Lilac, anthers light green; middle ear, ear length 19 cm, ear 4.9-5.2 cm thick, ear rows 14-16 rows, rows 36, harder grain type, grain yellow with white top, cob White, about 350 grams of grain weight, the rate of seeding is about 84%. Summer sowing period of 96-99 days.
Appropriate to promote the region: Hebei summer planting area.
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