The whole breeding cycle of mc703 is about 107 days. The color of leaf sheath and anther is purple, and the flower ribbon is red. The whole plant is compact, the plant height is 300cm, the ear position is 1 14cm, and the number of leaves in the whole plant is 2 1. Long ears, red axis. The variety was identified as resistant to stem rot, dwarf mosaic and big leaf spot on 20 14, and moderately resistant to small leaf spot and highly susceptible to head smut on 20 15.

First, introduce mc703 corn seeds in detail.

1 and mc703 plants are compact, with plant height of 300cm, ear position of 1 14cm, leaf number of the whole plant of 2 1, and the whole growth period of about 107 days.

2. The leaf sheath of this variety is purple, the anther is purple, the filament is reddish, and there are 4 tassels.

3. The spike of 3.mc703 is long, the spike axis is red, the spike length is 18.7cm, the number of rows per spike is about 16, the bald tip is 1cm, the yellow grain is horse-toothed, the 1000-grain weight is 357.5g, and the seed yield is 86%.

4. The protein content of mc703 was 10.4 1%, the fat content was 3.2%, the starch content was 74.02%, and the lysine content was 0.23%.

5. According to the appraisal results of hebei academy of agriculture and forestry Institute of Plant Protection, 20 14, mc703 is resistant to leaf spot, stem rot, dwarf mosaic and susceptible to leaf spot, and 20 15 is resistant to leaf spot, stem rot, ear rot, Curvularia leaf spot, rough dwarf mosaic and highly susceptible to tumor smut.

Second, the introduction of mc703

1, yield performance

(1) In the regional test of low-density group of summer sowing in Hebei Province in 20 14, the average yield of mc703 per mu was 763.3 kg.

(2) The average yield of MC 703 was 700.6 kg per mu in the same group regional test in 20 15 years.

(3) In the production test of 3)mc703 with 20 16, the average yield per mu was 669.5 kg.

2. Key points of cultivation techniques

(1) sowing date and density: this variety is suitable for sowing in early June, and the suitable planting density is 4000 plants/mu.

(2) Fertilization: 20 kg of corn special fertilizer, 15 kg; Diammonium phosphate is applied into mu of base fertilizer respectively; At jointing stage, topdressing urea 30 kg per mu.

(3) Pest control: pay attention to the control of red spider in the middle and late stage.

3. Suitable areas for planting

Mc703 is suitable for summer sowing in Tangshan, Langfang and its south area in Hebei Province.