Study On The Potato And Corn Cultivation Model Of Integrated And Efficient In Hanzhong Hilly Area

Hilly is the main producing area of upland crops in Hanzhong.Poor site conditions in the region, the land barren and inaccessible, basically no irrigation conditions, but rich solar energy resources(especially in sunny areas 800-1000 m altitude ground), mostly for more than a quarter, less than two quarters, very suitable for the development of intercropping mode.Through a lot of research and field test analysis, integration potato intercropping maize cultivation model more appropriate application hills and mountains in Hanzhong, but intercropping species, belt type, density, and other integrated cultivation technology is not perfect.To take full advantage of this high-yield cultivation pattern synergies, the research group carried out a series of experimental studies, and have made some meaningful conclusions to guide practice:(1) "Plastic potato- Corn" and "potatoes- corn" model plant efficiency is benefit of "wheat- corn" 3-5 times, and lower investment cost, suitable for planting in a large scale cultivation in Hanzhong hilly area. "Potato- maize- cabbage" mode of net income is 2423.17 yuan /666.7m2. Due to transportation and storage of cabbage intolerance, large-scale development will result in slow moving and low prices, plant efficiency decreased, so the extension area should not be too large.(2)The study showed that, potato yield in the "potato spacing 40 cm, Corn row spacing 40 cm, bandwidth, 150cm" treatment highest, was 1268.98 kg/666.7m2, and with other treatments significantly different; corn yield in the "potato spacing 40 cm, 40 cm row spacing Corn bandwidth 160 cm " treatment highest. Integratly, output value and pure benefit highest treatment was 40- 150 with type.(3)Results of comparative test of potato varieties, the stable yield and high yield of Zaodabai, Kexin-1 and Favorita were better than other varieties; The maize yield and economic characters of Zhongjin368 and Yuyu22 were better performance. Application of the above varieties suitable for hilly areas in Hanzhong Corn / potato efficient cultivation mode applications.(4)Through the experimental studies to determine the Hanzhong hilly potato / Corn integration efficient cultivation techniques, the best sowing corn should be around April 15 th, optimum sowing date of potato for the early and mid February, so conducive to high yields.(5)With the increase of planting density, the potato and corn yield showed a parabolic shape change. In the experiment, the corn had the highest yield when the maize planting density was 3000 plants /666.7m2, and the 2000 and 4000 / 666.7m2 treatment significantly different; The potato had the highest yield when the maize planting density was 3000 plants /666.7m2, and significantly different from the 2400 and 2750 / 666.7m2 treatment, a regression equation is established, obtained the highest yield of potato planting density was3244 plants /666.7m2.(6)The potato can obtain higher yield when N-P2O5-K2 O fertilizer was 10-5-14 kg/666.7m2. the establishment of fertilizer effect quadratic equations, and the equations derived: the highest yield was 2033.98 kg/666.7m2, corresponding amount of fertilizer:N-P2O5- K2O: 9.29-5.42-13.03 kg/ 666.7m2; the best efficiency yield was 2030.69 kg/666.7m2, the best economic fertilizer as N-P2O5-K2O: 8.9-5.27-11.58 kg/666.7m2, N:P2O5:K2O was 1:0.6:1.3. As the favoring potassium crop, potassium potato crop deficiency in the field may be appropriate to increase the potassium potash fertilizer; in fertilization with boron or zinc fertilizer had certain effect on potato yield.(7)During the growing use of chemical control of potato late blight disease had disease prevention and insurance products effect, in which to 68.75% SC and 60% silver Farley flumorph · WP Mancozeb use had the best yield increasing effect.