Research On A Modern Field-project Mode In The District Of Rice-xerophyte Rotation

With the development of modernization construction and the transfer of agricultural labour, and with the advancement of agricultural mechanization and scale management, the traditional field-project and cultivation mode can't meet the requirement of modernization construction. The field-project construction of the modern rice-xerophyte rotation is regarded as an important means to ensure the food safe. With the reform of management system, more attention should be paid to this kind of construction. Taking the modern field-project mode in foreign Countries, a modern field-project mode in the district of rice-xerophyte rotation is brought forward, on the basis of meeting the damands of drainage and waterlogging reduction, the object of which is to improve the efficiency of the agricultural machines.The farmland irrigation and drainage mode with "two kinds of closed conduits and one kind of open ditches" is introduced in this paper, and the high standard field-project mode is analyzed. As far as the mode is concerned, main factors that affect the field size is the efficiency of agricultural machinary, but not the spacing of the final fixed drain for waterlogging reduction. The farmland should be suitable for machines cultivating, planting and harvesting. The relationship between the farmland size and agricultural machinery efficiency is also analyzed in this paper. The sizes of farmland are determined as follows, which can make best use of large and medium machines.(1) If the cubage of the seeding-machine is considered, the farmland size recommended is 40m×150m or 60m×100m(width×length), which can ensure the efficiency of agricultural machines high than 70%.(2) If the cubage of the seeding-machine is not considered, the farmland size recommended is 100m×250m, 60m×300m or 200m×250m(width×length), which can ensure the efficiency of agricultural machines high than 70%.(3) With the augment of the ratio (length/width),the efficiency also increase. The farmland size recommended is 100m×250m or 60m×300m(width×length).(4)Because the cubage of the seeding-machine restricts the efficiency of agricultural machines, this paper proposes the exploiture of a new kind of seeding-machine, which can crop 1.8hm~2 at a time.To control the water in soil and groundwater level, we should lay the subsurface drainage pipes. The article builds the model about the depth and spacing of subsurface drainage pipes. Adopting the genetic algorithm with real coding, the paper calculates the depth and spacing of subsurface drainage pipes by a program with Visual Basic. Compared with the common design means, the rapidity is quick, the result is precise and the practicability is strong. The results indicate that the depth and the spacing of subsurface accord with the case of experiment in fields.