An Fang (Wusu City Seed Management Station, Xinjiang Uygur Autonomous Region)
The Wusu Municipal Seed Management Station has been responsible for the national and regional maize variety regional trials for many years. In the process of trial implementation, it has continuously summed up experience and improved methods and explored more effective test methods and management measures for reference by peers.
1 basic conditions
Wusu is located in the center of Eurasia, at the southern edge of the Junggar Basin, between 43'29'N ~ 45'27'N, 825'58'E ~ 85.16'E, and the plain is 478m above sea level. Rich, abundant sunshine, about 175 days frost-free period, the effective accumulated temperature of annual average temperature greater than or equal to 100 °C 3300 ~ 3600 °C, more favorable for corn growth.
2 test methods
2.1 Preparation before Broadcasting
2.1.1 Selection
In order to ensure the accuracy and reliability of the test data, representative plots are selected. The land is required to be convenient for irrigation and drainage, the land is flat, the fertility is even, there are no tall buildings and trees around, and the transportation is convenient to facilitate the exchange of visits.
2.1.2 Soil preparation
According to the meteorological information, determine the appropriate sowing date, according to the sowing date for site preparation. The quality of site preparation has reached the six-character standard of “qi, flat, loose, broken, net, and squatâ€.
2.1.3 Selection
In order to increase the rate of seedling emergence and to achieve rapid seedling emergence, Miao Qi and Miaoquan, at the end of March, the seeds provided were further selected, and the seed, seed and seed were removed at one time, and the seeds were divided into three equal parts for use.
2.1.4 Test Design
After the site preparation, according to the preliminarily drawn field arrangement sketch, a random block arrangement design is adopted to draw out each plot, and then the signboard filled with the name code of the species is inserted into the plot to facilitate observation and record.
2.2 sowing
2.2.1 Sowing period
Do timely sowing. When the soil 5cm temperature stable through 10 ~ 12 °C sowing, due to the limited amount of seed provided by experts, for the sake of insurance, the normal year sowing date is generally scheduled for April 22 to 27, to prevent late frost after emergence, to ensure the success of the test.
2.2.2 sowing method
Artificial hole sowing method is generally used, with 2 to 3 seeds per hole. The test bearer distributes the seed according to the sketch and the breed number. At the same time, the seed is punched on the film by the rolling small-scale seeding device according to the adjusted spacing of the plants. The seed robbers are used to seed and seal the holes. In order to ensure the seeding quality, the technicians must To supervise the sowing and covering of the soil, so as not to miss the broadcast, and the broadcast depth is the same.
2.2.3 Nursery
In order to do a good job of complementing the seedlings, a patch of seedlings for each species should be set in the aisle. After the seedling recruitment work is completed, excess surplus seedlings are removed to make the test more neat and easy to operate.
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