Study On Effect Of Leaf Fertilizing Of N And Fe On Growth And Greed Period Of Emei Centipede Grass

Abstract: E-mei centipedegrass is a wild idioplasm resource of Sichuan. It is akinds of warm season turf grass of leanness and low management tolerating . It having low survive rate, slow growth velocity , low turf quality , unpleasant color and short green stage at the prophase of turf establishment when stolon segment was used as the turf establishing material. In this study tier-divisor was used to design the examination. N, Fe,N+Fe as three treament of leaf fertilization. Pure urea and EDTA-Fe were used to supply N,Fe. The treatment degree of N is 0, 2 ,4, 6g/m2, of Fe is 0, 0.4, 0.6, 0.81/m2, N+Fe was supply at the same stage using the correspond content of N and Fe. At different season, supplying the turf with different fertilization of different contents. The effects of supplying N,Fe at leaf to the development, and green period has been analyzed. Result show that:1 .Treatting the stolon segment material with Urea solution of 4% concentration can improve suiviving rate by 24%, improve root development. Treating with N+Fe solution of 4% concentration can improve shoot segment survive rate by 32%, and gain deepen roots system.2.Leaf fertilizer with N, Fe all can improve tillerring of centipedegrass. Supplying N on leaf improve growth velocity by 17-32%. Bring foreword establishment date 12-25 day; supplying Fe of 0.611/m concentration can bring establishment date 25 day. But if the concentration is too high, the supply will bring backword establishment date.3.At different season, can improve turf quality at different style.: spring supplying with N of 6g/m2 makes turf improve at coverage, density, uniformity. Supplying at41summer with Fe of 0.611/m2 can improving density, color, uniformity of turf. When supplying autumn with N of 4g/m2 and 0.61/m2 of Fe together, the green periods can be prolong.4.Turf leaf lamina comes shorter, narrower and thicker, if supplying Fe on leaf surface at summer. It makes Canopy height lower by 0.5-0.8cm, so we can improve sight effect of turf by supplying Fe. The distribution range of roots extended, so the drought tolerance improved.5. Suppying Fe, N+Fe at autumn can improve the content of matter correlated with cold tolerance. Fe Fertilizing with concentration of 0.61/m2 or fertilize with 4g/m2 of N + 0.61/m2 of Fe can improve contents of proline, soluble carbohydrate and catalase by 25%, 310%, 180% and by 41%, 182%, 160%.6.Fe, N+Fe fertilizing at autumn can delay caducity, put scorch date backward by 2-6 day. Bring Regreen date foreward by 4-8 day at second year. Especially treatment of 4g/m2 N+0.61/m2 Fe can makes green periods reach 325 day, excesses comparison 15 day...