Effects Of Different Fertilization Formulas On Yield And Economic Benefit Of Huayouza 6th In Mianyang Area

This study was carried on with semi-winter cabbage type of rape NO.6 of Huayouza series.In Santai County in Mianyang. Sichuan Province, as the test point, we carried out the influence of different N, P and K fertilizer to rape agronomic traits, which is desiged to get the highest suitable ratio of N, P and K and related economic benefits for guidance of rapeseed and reasonable fertilization, to improve the fertilizer utilization and protection of the ecological environment and provide a scientific basis. The main results are as follows:1. Rational application of N, P and K could improve the agronomic characters, and promote the improvement of yield and benefit. The application of N. P and K fertilizer was closely related to the growth and development of rape. The test results show that the effect of N fertilizer on rape plant height, long spindle, effective branch number in a single plant, pod number in a single plant and 1000-seed weight had significantly improved, and with the application of N increased increased rapidly at first and then decrease, with the increase of N fertilizer, rape on N absorption and utilization rate reached saturation, later with the application of N content continues to increase, the rape of the agronomic performance decreases as the increase. Fertilizer on rape plant height, pod grain showed a positive trend, and with the K fertilizer increased, plant height and grain number per pod also increases gradually; Early flower node position, pod number and grain weight with P fertilizer application rate increased first and then showed a decreased trend, indicating that the amount of K fertilizer could be suppressed at the high level of branch section of rape, the pod number and 1000-seed weight increased. By rational application of N, P and K, the improvement of agronomic characters of rape could be promoted, which could increase the yield and efficiency.Under different N, P and K fertilization ratio, the whole growth period variation of rape to no fertilizer treatment shows the shortest growth period. With the increase of fertilizer, the growth period of rape days gradually increases.2. Rational application of N, P, K fertilizer can significantly increase the yield of rape. In middle level of P, K fertilizer, the amount of N fertilizer application contributes to yield of rapeseed showed a trend of increased at first and then decreased, the yield from high to low followed by middle level of N fertilizer>high level of Nfertilizer> low level ofNfertilizer>Nfertilizer free. The N fertilizer levels and maximum yield gap between the level of Nfertilizer, and high level of N fertilizer was lower than the yield in middle N fertilizer level, indicating that the application amount of Nfertilizer in the presence of threshold is the maximum, namely N fertilizer yield level highest when N fertilizer application rate continues to increase but inhibit rape yield continued to increase. Therefore, the best N application amount should be in the medium to high (150 kg/hm2-225 kg/hm2) n level. Generally speaking, the highest yield of rape was 3218.2 kg/hm2.3.Reasonable application of N, P and K fertilizer could increase the economic benefits of a rape. From the maximum profit and the best fertilization benefit, among all the 14 fertilizer combination to yield, output value of middle level among N, P and K fertilization proportion is the highest. The nitrogen phosphorus potassium (N:150 kg/hm2, P:90 kg/ hm2, K:0 kg/hm2 fertilizing levels on the yield of rape was the highest 3218.2 kg/hm2, the net profit of the highest for 14934.3 yuan/hm2, fertilizer efficiency was the highest 6883.6 yuan/hm2. This theory estate investment ratio is also the highest, is6.22.4.The relationship between different N, P and K fertilization ratio and fertilizer utilization ratio. From the point of view of soil N supply, the content of available N and P fertilizer in the soil at a low level, as available K fertilizer content in a middle level. From the point of view of the utilization ratio of agriculture, the utilization ratio of N fertilizer and K fertilizer was at a moderate level, while the utilization ratio of P fertilizer was low. From the point of view of partial factor productivity, N, P and Kfertilizer in the partial productivity decreased with the increase of fertilizer application amount.Whilethe partial factor productivity of K fertilizer is the biggest and N fertilizer follows, P fertilizer is the smallest.