| Field experiment was conducted in medium fertility soil to study the effects of different fertilization measures on the growth of super rice. The results of four seasons on two years showed that the technology scheme of adding formula fertilizer on the basis of basal application of slow release fertilizer and organic fertilizer significantly enhanced the total root surface area, total root volume, total number of root tips of rice roots and was in favor of the root length (diameter 0-0.3 mm) for nutrient absorption, meanwhile, it increased the nutrient absorption and transfer ability of super rice, which postponed the senescence rate of populations in rice late growth to some extent, thereby increased the yield of super rice. Generally, double cropping rice could obtain the high yield level at 646.2 kg/667m2 on average and 712.4 kg/667 m2 at the maximum. The improvement of cultivation techniques by fertilization practice could significantly promote the yield - increasing potential of super rice, and achieve the aim of stabilizing and increasing food production capacity. Based on the economic benefit analysis, the application of slow -release fertilizer in super rice paddy was economically feasible to improve efficiency and to reduce the input of artificial cost under the condition of moderate yield. |
