4 Protect line does not grow the same crop
The problems caused by the protection line not planting the same kind of crops are relatively large. First, there is a problem that crops with different heights or stalks are not suitable for the different crops in the line planting and field trial fields. The role of the protection line. The second problem is that it is prone to problems that the district test field and the protection bank cannot operate in a unified manner. The third is that the maturity of the two crops is different, which brings certain difficulties to the harvesting work. Analyze the reasons: (1) Some pilots do not understand the protection of the same line of crops in the protection line and the field test field, and are free to determine the protection line of crops. (2) When some pilot plants were planted and protected, due to the lack of seed of similar crops, some conservation lines were replanted into other crops. To solve this type of problem, it is necessary to increase the correct understanding of the protection of the planting of similar crops, according to the provisions of the same crop and field trial, the conditions of the pilot not only around the same crop and the same species. In addition, for the species to supply the regional test seeds, together with the protection line seed supply, can also be a good solution to such problems.
5 cells designed to be square or nearly square
One of the problems that often arises in Tian Wen's design is that the community is designed to be square or nearly square. The crux of the problem lies in: (1) The square plot of the square plot within the same repetition is pulled long, causing large experimental errors. (2) The square community is not convenient for field management and observation records. Analysis of the reasons: (1) In some trials, the experimental plots were restricted by the terrain, and the plots had to be designed as squares or nearly squares. (2) Some of the pilots have unclear proportions of the length and width of the community design, and are mistakenly designed to be square or nearly square. For such problems, we must start from the selected site, select and build the test land suitable for the area and nature of the tasks required by the district trial, and design the rectangular community strictly according to the ratio of 1:3 to 5. However, for some crops with large marginal impacts, the community may be designed to be square or nearly square as required by the plan.
6 The size of the community is not the same
The area of ​​the community is large and some are small, so that some breeds are located in large-area communities, while some breeds are located in small-area communities. Artificially caused unequal treatment of the tested varieties, resulting in large errors in the test results. One such problem occurred. First, some of the pilots in the Tian Qiao design, the amount of size and line is wrong, or different repetition is not a person's size, the ruler is not the same as pulling tight. The second is that although some of the pilots were not misunderstood, some of them were far off the line when they hit the ground. Some of them hit the ground on the line, causing the area of ​​the community to be different. During the implementation of the regional trial, the field design must be seriously responsible for measuring the size, and must be checked and checked;
7 The sowing of the community is close to the land
In the regional examination, it was found that although the area of ​​the plots designed by the pilots was the same, some sowing lines in the plot sown were close to the mantle, and some were far away from the mantle, 10 cm or even 20 cm, causing inconsistent conditions and making the plot close to the plot. Some species have relatively expanded the area of ​​the community, while some species far from the mantle community have relatively reduced the area of ​​the community, artificially causing unfair treatment of varieties. Through discussion with the relevant test personnel to understand the reasons, the first is that some of the pilots used artificial openers to sow the seed sowing method. The groove line was not drawn in advance, and the error was large when the trench was opened. The second is that some of the pilots adopt the broadcasting method, and the shaking technique is poor. The distance from the mantle to the mantle is far from mastered. In order to solve such problems, the test takers must attach great importance to the sowing of crops and improve the sowing techniques. No matter which sowing method is adopted, we must line up and sow the seeds.
8 Sowing crops are perpendicular to the long side of the plot
Sowing crops perpendicular to the long side of the plot is also an easy problem. The crux of the problem lies in: (1) The sown crop lines are perpendicular to the long side of the plot, which increases the number of rows sown, and the number of rows at the beginning and the end of the plot is more likely to appear. Improper seeding rate, uneven emergence and other issues. (2) Inconvenient for field management operations. (3) Inconvenient to record. There are three main reasons for the problems. One is that some of the test takers have not mastered the basic knowledge of the district test. They believe that no matter what the direction of sowing, it does not affect the results of the district test. Second, some of the pilots are affected by local farming habits. The third is that some of the pilots are subject to restrictions on sowing tools and other conditions. To solve such problems, it is necessary to improve the quality of the district-level test personnel, require them to conscientiously study the basic knowledge of the district test, grasp the key points of each link in the implementation of the district test, and improve the method of sowing, in order to improve the quality of the district test, and adopt the direction of sowing the crop. Parallel to the long side of the plot.
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