Key points of production Technology of Green Food German Rice Onion

1 base conditions

The production base of green food German rice onions should be selected in areas with no atmospheric pollution and good ecological environment, and should be far away from industrial and mining areas, trunk roads and railways, and avoid the influence of industrial and urban pollution sources. the environmental quality conforms to the first class standard listed in the national atmospheric environmental quality standard GB3095-82. at the same time, the soil and water resources have the conditions of high quality, high yield and sustainable production of German rice onions.

2 Variety characteristics of German rice onion

German rice onion is a temperature-loving plant, which is more heat-resistant but not cold-resistant, and the suitable temperature for growth is 22-24 ℃. When it snows or the temperature is low in winter, the aboveground part dies and enters the dormancy period. When the temperature rises in spring, it can sprout new buds and continue to grow, which is suitable for slightly acidic loam or sandy loam (pH value 6.5-7.5) loam or sandy loam. Clayey soil is more favorable for rice onion to survive the summer with high temperature. German rice onions like moisture and avoid dryness. The fields should always be kept moist.

3 seed selection

The seeds harvested in the autumn and winter of the first year should be selected. The plumpness and purity of the seeds should reach 97%-98%, the purity should be more than 95%, and the germination rate should be more than 80%. The selected seeds should be sown in the spring and summer of the year in order to cultivate strong seedlings.

4 seed treatment

(1) the germination rate of seeds is measured before sowing. The germination rate is about 80% before sowing in the field. Seeds with poor germination potential should not be used, so as not to cause non-emergence in the field and affect the sowing season.

(3) soaking seeds with 0.2% potassium permanganate aqueous solution at room temperature for about 30 minutes can kill bacteria attached to the seed coat and resist drought emergence.

5 raising seedlings

5.1 seedbed preparation

The sandy loam with loose soil, rich organic matter, flat terrain and convenient drainage and irrigation was selected. The soil moisture was 10 ~ 12m long and 1.5 ~ 1.7m wide by applying 45 ~ 60t rotten organic fertilizer per hectare, common calcium superphosphate 750kg, deep turning and fine raking, leveling and making soil moisture.

5.2 sowing

Raise seedlings and transplant in small area. It is necessary to set up a small arch shed to cover the seedlings when sowing from January to February in spring and a sunshade net to raise seedlings when sowing from March to April in summer, so as not to affect the emergence of young buds. After sowing, cover a little soil and fully irrigate so that the soil absorbs water to reach a completely saturated state.

5.3 seed amount used

3.75 to 4.50 seeds per hectare of field