3 Field Management
3.1 check membrane seedlings, fill seedlings
During the emergence of the seedlings, the test personnel should often check the emergence of the seedlings in the field, and timely check the membrane to release the seedlings pressed in the soil and in the membrane. If the seedlings are transplanted at the four-leaf stage, the whole seedlings will be tested.
3.2 seedlings, Dingmiao
The seedlings and the Ding Miao are each subjected to one time, that is, the seedlings are asked in the three-leaf and one-hearted period, and the four-leaf one-heart to the five-leaf stage are used to determine the seedlings. According to the experimental program, the number of plantlets per unit area was converted into the number of plants left in the plot.
3.3 Cultivated weeding
Cultivate 2 or 3 times. It plays a role in loosening the soil and warming the soil and removing the weeds.
3.4 Fertilization
3.4.1 The base moon
Deep farmhouse fertilizer 22.5 ~ 30.Ot/hm2, NPK fertilizer 450kg/hm2, urea 150kg/hm2.
3.4.2 Dressing
A total of 2 times, in principle no fertilization at the seedling stage, combined with the first water for the first time dressing, accounting for 70% of the total amount of topdressing, the second topdressing before tasseling, silking period, accounting for 30% of the total amount of fertilizer. The experiment adopts the technology of drip irrigation and water-saving technology under the membrane, combined with drip-irrigation and three-time special fertilizer, that is, the first drop of fertilizer on June 26, the amount of drip fertilizer 75kg/hm2; the second drop of fertilizer on July 5th , Drop fertilizer amount 75kg/hm2; The third drop fertilizer on July 26, dropping fertilizer 45kg/hm2 special fertilizer and urea 75kg/hm2. Drip fertilizer method: Before fertilization, drip lh water, then add fertilizer, and other fertilizers drip and then drip 1h water.
3.5 Irrigation
After the emergence of corn seedlings, dry elephants began to water. Irrigation 4 to 5 times. If the drip irrigation generally drops once every 10 days or so, water will be dropped every 5 to 7 days during the peak of corn water demand, and the amount of drip will be increased. Dripping 8 to 11 times.
4 timely harvest
Harvested when the ripe black layer of the grain reached 90%. After the ear of the production sample was air-dried, it was detached from the weighing scale, and converted into the plot's output according to the standard moisture of 14%. The output of the plot was converted into the output per unit area. The test survey items were recorded according to the national corn variety regional standard.
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