| Quadratic general regressive rotation design with four factors, including planting density, nitrogen rate, phosphorus rate and potassium rate were conducted to study the cultivation models of high quality hybrid maize Zhenghong 211 for high yield and high benefit in Southwest plateau of Sichuan, central-hilly region of Sichuan and mountain areas around Sichuan province and the formation characteristics of yield and quality in this paper, the results showed the following aspects:1. The mathematical models for yield and benefit with planting density, phosphorus, nitrogen, potassium were established based on results from the ecological regions experimental data. The optimizing models for high yield (more than 12000kg/hm~2 in Xichang and 9000kg/hm~2 in Santai and Ya'an) and high benefit (more than 19000yuan/hm~2 in Xichang and 15000yuan/ hm~2 in Santai and Ya'an) were calculated by the distributing frequency statistical method. The results showed that the planting density was the fundament and the scientific controlling of nitrogen, phosphorus, potassium was the guarantee of gaining high yield and benefit.2. The results of comparing the optimum cultivation of high yield with high benefit in different regions showed that there were higher levels of planting density, nitrogen rate, phosphorus rate and potassium rate application to high yield than high benefit. However getting high yield was not sure getting high benefit, the consideration should be taken into account better the relationship between high yield and benefit in production. The mathematic models for high yield and high benefit were established based on results from ecological regions experimental data. The optimizing models for high yield more than 12000kg/hm~2 and high benefit more than 19000yuan/hm~2 were calculated by the distributing frequency statistical method and composed by that the planting density was7.29-8.81 planting per m~2, nitrogen was 276.24-339.72kg per hm~2, phosphorus was 1144.88-1480.13kg per hm~2, and potassium was 359.40-440.64kg per hm~2 in Xichang; The optimizing models for high yield and benefit more than 9000kg/hm~2 and 15000yuan/hm~2 in Santai and ya'an were composed by that density was7.54-8.83planting per m~2, nitrogen was 297.12-381.72kg,phosphorus was 734.25-1001.25kg and potassium was 203.52-235.32kg per hm~2; and that density was7.27-8.51 planting per m~2, nitrogen was 243.60-277.56kg,phosphorus was 841.50- 1129.88kg and potassium was 99.60- 181.56kg per hm~2.3. There were some distinctions with yield component traits of zhenghong211 because of the characteristic of different ecological regions. The plant height was lower and the number of row per ear was fewer in Xichang than other regions, however, the ear length, the number of kernel per row and1000-grain weight of zhenghong211 was higher, the content of starch and yield were the highest but the content of protein was the lowest in Xichang. The yield was the lowest, the number of kernel per row, the ear length and the content of starch were lower but the plant was higher, the content of protein was the highest in Ya'an. The yield component traits were approximately between Ya'an and Santai, but the yield of Santai was higher than Ya'an, the content of starch and protein were between Ya'an and Xichang in Santai.4. Correlation analysis indicated that the order of contribution rate about four component traits to yield as follows, the first was the number of kernel per row, the second were the number of row per ear and effective spike in Xichang; the first was the number of kernel per row, the second was effective spike in Santai; the first was effective spike, the second was 1000-grain weight.5. The relationship of planting density, phosphorus, nitrogen, potassium with dry matter accumulation and LAI and the relationship between dry matter accumulation, yield and LAI had been studied in this paper, the results indicated that there was a positive correlation between the dry matter accumulation and LAI in shooting stage and autumn, there was a quadratic protruding function between grain yield as well as dry matter with LAI in spin silk stage and autumn. It was an important guarantee of increasing dry matter accumulation to gain sufficient LAI before shooting and prevent zhenghong211 presenility in grain filing. The LAI should be suitable for growth, thereby, grain filing was ensured but late maturity and excessive growth were prevented in spin silk stage and autumn of zhenghong211.
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