The cultivation techniques of horseradish interplanting spring maize

First, select species

The horseradish seeds that have been purified, rejuvenated, weak in branching, resistant to stress, disease resistance, high yield, and high quality are used for seeding. Seedlings require 15-20 centimeters in length, have a purity of not less than 98%, have no mildew, no roots, and no color. Bright, germination rate is above 95%. Maize can use Dandan 22, Denghai 9 and other varieties.

Second, the site preparation

1. Site preparation: Horseradish is a deep-rooted vegetable crop, and it should be selected in the deep soil layer, deep plowing before winter or early spring, so that the virtual reality.

2. Rigging: According to the growth characteristics of horseradish, it is usually planted in ridges, and the ridging time is mid-March, and the height of dragons is 20-30 cm.

Third, fertilization

According to the requirements of horseradish and the requirement of horseradish and spring corn for nutrient, we should master the principle of applying base fertilizer as the main factor and supplementing topdressing fertilizer.

1. Base fertilizer: Before winter or in early spring, cultivating 3000-5000 kg of organic fertilizer in Mushi, 50 kg of ammonium bicarbonate, and 75 kg of superphosphate.

2, top dressing: mid-fertility horseradish per mu cooked-cake cooked fat 30-40 kg; corn in the big bell mouth mu recovery urea 20 kg.

Fourth, cultivation

1, timely planting: According to the characteristics of horseradish like cool climate, the local temperature stability through 12 °C, from late March to early April robberies or fleas planted. Spring corn is sown in the middle of April.

2, planting methods: horseradish seedling planting, a hole per plant, soil compaction, when planting, first in the ridge back obliquely deep 30 cm, with the ground into a small angle of 60 degrees, the top of the root seedlings into the top Holes, then cover soil 2-3 cm compaction. Corn can be ordered in the ditch.

3. Density: One ridge and one row of horseradish, planting density is generally 3500-4000 strains per mu. One groove and one row of corn, planting density is generally 3000-3500 strains per acre.

V. Field Management

1, valerian: horseradish planted Qimiao 30-35 days after planting, until the mid-growth, corn seedlings pay attention to timely planning, removal of weeds, broken knot board.

2. Watering: Horseradish sprouts in the early stage of growth to form a strong root system. If the weather is dry, it should be watered in time so that the root system can develop normally and lay a good foundation for high yield. In the mid-growth stage, watering or no watering may be reduced in order to prevent stems and leaves from becoming longer. In the middle and late period, corn is the peak period of water and fertilizer, and it can be solved by pouring small water along the ditch.

3, soil: horseradish in the later management, plant height 35-40 cm, must be appropriate soil, to prevent lodging. Corn combined with cultivator can cultivate soil.

4. Pest control: Horseradish has fewer pests and diseases. In the middle and later stages, cabbage caterpillars, cotton bollworms, and carnivorous insects can occur. Artificial pests can be used to eliminate pests, or Bt biocides, medicarb salts, and kangfuju spray can be used for prevention and control. Corn should pay attention to the prevention and treatment of rough dwarf diseases. Seeds can be used for imidacloprid seed dressing. Phytophthora infestation can be sprayed 2-3 times.

Sixth, harvest

1. Harvest: The harvest period of corn is from mid-July to early August (sale of tender corn). The corn cob can be hacked down. The straw remains in the field for horseradish and the horseradish is harvested in early November.

2, storage: In the choice of high-pitched, air-permeable place, dig a meter deep, put the horsegrass under the grass, then cover a layer of grass, and then cover soil compaction. Http://

Tetrabromobisphenol A CAS No.79-94-7

Tetrabromobisphenol A Basic Information
Product Name: Tetrabromobisphenol A
CAS: 79-94-7
MF: C15H12Br4O2
MW: 543.87
EINECS: 201-236-9
Mol File: 79-94-7.mol

Tetrabromobisphenol A Structure

Tetrabromobisphenol A,Tetrabromobisphenol A Msds,Tetrabromobisphenol A (Tbbpa),Tetrabromobisphenol A Bis (2 3-Dibromopropyl Ether),Tetrabromobisphenol A Bis

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