| Maize is an important grain crop in the world. Now it has been become important food, feedstuff and economy crop because of its versatile usefulness. The planting area and yield of Maize is only inferior to rice in China. After China joined WTO, maize industry will be impacted seriously in China agriculture production. High-yield will be still the main objective in maize's production.Climate characters are high temperature, much humidity and insufficient light in Chongqing. So the maize yield is not very high. With the development of animal husbandry and packing industry, maize's gap is above 5.00×10~5 tons every year. In a long time, farmers can not master the main ecological factors precisely which effect the maize yield, for example seeding data, planting density and so on. They worked by experience and considered falsely that high fertilization can gain high yield. Fertilizer efficiency was low because of improper application of fertilizers. A lot of fertilizer was loss to rivers and lakes, and non-point pollution was intensified.According to our preliminary research, fertilizing in the key period has an extremely significant effect For example, we can centralize fertilizer to seed in the seedling stage, use organic fertilizer to strengthen seedling during the transplant period, and apply ear fertilizer during trumpet period. Mastering the key ecological factors for crop's growing development and yield can achieve high-yield and decrease the amount of fertilizers. That is the high-yield cultivation mode. Based on this mode we can heighten maize's yield, solve maize's shortage problem, and play an important role in decreasing no-point pollution.Based on the orthogonal quadratic regression design method, the test studied the compact maize's high yield cultural model which was affected by ecological factors in shallow hillock and plane dam areas of Chongqing.. The maize's high-yield was obtained by ascertaining best sowing... |
