Huang, L; Xu, Wei; Cheng, S; Zhao, Z; Wei, S; ,
Using pot experiment, study the L size crosslinked polyacrylamide (L - CPA) and urea with way of banana seedling growth and nitrogen absorption, leaching, residue, apparent loss of n to the influence of reasonable L - CPA in banana seedling stage. The results showed that in the banana seedling stage 1-cpa and urea mixture or adsorption and distribution can significantly improve the high and nitrogen uptake of banana seedling stage, respectively, 16.62% and 19.26%, 29.44% and 49.15% respectively. The percentage of nitrogen in plant absorption was increased by 7.58 and 12.65 percentage points respectively, while the apparent loss decreased by 5.72 and 6.16 percentage points respectively. Compared with the application of urea nitrogen, the adsorption of 1-cpa and urea could also significantly promote the accumulation of dry matter in banana seedling stage and increase 39.63%. Reduced nitrogen leaching loss by 4.01 percentage points; In addition, the nitrogen absorption and nitrogen content of banana seedling stage were significantly higher than that of urea three times in plant absorption, and 7.41% and 2.65 percentage points respectively. To sum up, in banana seedling with L size crosslinked polyacrylamide with urea, appropriate USES adsorption with, will be more helpful in banana growth, promote the nitrogen absorption use, reducing the loss of nitrogen leaching and apparent, reduce the number of fertilization.During the whole growth period of the banana, the growth of banana in the seedling stage directly affects the regularity of the growth of the banana, thus affecting the economic benefit of the banana ([1-2]). The banana field seedling production, sale the heavy nitrogen, the traditional acupuncture point or cucumber in application of urea for many times, and after application of urea for flood irrigation or spraying on the moisture of excessive, cause seedling artificial cost is higher, low utilization rate of nitrogen fertilizer, serious water pollution, reduce soil quality and other issues. Excessive application of urea causes the concentration of nitrogen nutrients in the surrounding nitrogen of banana seedling stage, which can cause fertilizer damage, causing the plant to grow slowly and even die ([3-4]). Therefore, it is of great significance to carry out the management of the water fertilizer of banana seedling stage science and to the high quality and high yield of bananas.Water retention agent can effectively regulate soil water, heat and gas status, promote crop growth, reduce leaching loss of nutrients, improve fertilizer utilization rate, and have good protection of fertilizer and anti-leaching effect ([5-8]). The application of SAP in banana seedling stage and the treatment of urea with urea can provide effective measures to solve the management of banana seedling stage. Crosslinked polyacrylamide (CPA) is used as a good stability, salt tolerance, good water retention and good SAP, better suited to the soil of clay in the south of the soil ([9-10]). Based on this, this research adopts the S, M, L size of CPA with urea mixed fertilizer, the results show that compared with urea nitrogen fertilization once, CPA applied urea can significantly reduce the amount of nitrogen leaching, by an average 15.92%; Increased nitrogen residues increased by 13.42% on average, and ([11]) was the best result in the CPA. In addition, studies have shown that there are two kinds of mixed and adsorption methods of CPA and urea distribution, and there are differences between the two methods ([9, 10, 12-13]) Based on this, combined with previous results, this study, using pot experiment in seedling stage of banana as the research object, further study on L - CPA and urea with different ways of banana seedling growth and nitrogen absorption, leaching, residue, apparent nitrogen to influence, such as the loss in banana seedling stage the most suitable match way, reasonable L - CPA in banana seedling stage.