Bahiagrass Seed Production Technology

Three factor ( N of fertilization, K of fertilization, firing) and orthorhombic experiments was used in this study. According to the effect of mainly agronomical characters and factor of N of fertilization, K of fertilization, firing on the yield and quality of Paspalum notatum seed, the result showed that seven agronomical characters have a significance correlation with seed production of individual plant, the correlation coefficient: spike number of plant > granule number of spike > length of spike > weight of one thousand granule > weight of stems > height of plant > weight of leaves. weight of stems have not a significance correlation with granule number of spike, the result of N of fertilization showed that the height of Paspalum notatum increased with raising the input of N of fertilization, N of fertilization have not a significance correlation with height of plant, when N of fertilization reached 8g/m², spike number of plant, granule number of spike and seed production reached maximum, seed production: 682kg/hm², germination of seed: 85%, the result of K of fertilization showed that the effect of 7.5g/m²K₂O, the genital branch appeared concentration and increased 22% by no fertilization, length of inflorescence and number of spike increased 7.65%, 84.6% respectively, potential seed production increased. weight of one thousand granule and activity of seed enhance significantly, the result of firing showed that, the green time of Paspalum notatum were ahead by 7—10 days, developed very well, number of stooling increased, this supplied substances and energy to differentiation of inflorescence, the number of genital branch was more the no firing, weight of one thousand granule of seed increased by 11.6%, the seed production increased by 46.36%. the mathematical model of seed production and N(x₁), K₂O(x₂), P₂O₅ (x₃) was put forward according to seed Production experimentY=149.53+5.31X₁+1.49X2+1.54X₃-0.0122X₁²-0.0038X₂²-0.000053X₃²-0.0086X₁*X₂ -0.007X₁*X₃+0.0055X₂*X₃ (F=6.608, R=0.9058), By regression analysis, seed production of Paspalum notatum of suitable fertilization N, K₂O, P₂O₅ was put forward , the suitable fertilization N, K₂O, P₂O₅ was 83.404kg/hm², 187.128 kg/hm², 149.856 kg/hm² respectively.