Abstract: In order to screen the optimum proportion of the pelletization formulas of sorghum-sudangrass hybrid seed,and promote seedling growth of sorghum-sudangrass hybrid,the mixture design was used to study the effects of different materials(super absorbent polymer,groundnut hull powder,attapulgite)ratios in pelletized preparation on the physical properties,germination characteristics and seedling growth of pelletized sorghum-sudangrass hybrid seed.The results showed that formula 4(super absorbent polymer∶groundnut hull powder∶attapulgite=12∶73∶15) had the best germination characteristics,the germination rate of formula 4 was 1.04 times of CK,the germination energy was 1.45 times of CK,and the germination index was 1.53 times of CK; the emergence rates of formula 2(super absorbent polymer ∶groundnut hull powder∶attapulgite=5∶80∶15), formula 10(super absorbent polymer∶groundnut hull powder ∶attapulgite= 19∶66∶15) and formula 21(super absorbent polymer ∶groundnut hull powder∶attapulgite=26∶52∶22) significantly increased by 23.8%,40.5% and 22.6% compared with CK;pelletization formulas had higher plant height, maximum leaf length and leaf area than CK;pelletization formulas had higher fresh and dry weight than CK except for formula 20(super absorbent polymer∶groundnut hull powder∶attapulgite=12∶66∶22) and formula 21.The ratio of super absorbent polymer had very significantly positive correlations with compressive strength, water absorption and germination characteristics;there were positive correlations between ratio of groundnut hull powder and seed germination characteristics and seedling growth;ratios of attapulgite and super absorbent polymer had negative correlation with seed germination characteristics and seedling growth. Overall,formula 4(super absorbent polymer∶groundnut hull powder∶attapulgite=12∶73∶15) was the best formula for the pelletization of sorghum-sudangrass hybrid seed.

Key words: Sorghum-sudangrass hybrid, Seed, Pelletization formula, Seed germination, Seedling growth

摘要： 采用混料试验设计，研究丸粒化制剂中不同物料(吸水树脂、花生壳粉、凹凸棒土)配比（共21种配方）对高丹草丸粒化种子物理性状、萌发特性和幼苗生长的影响，以筛选出最优丸粒化配方进而促进高丹草种子萌发及幼苗生长。结果表明，所有配方中，仅配方4(吸水树脂∶花生壳粉∶凹凸棒土=12∶73∶15)的种子发芽特性均较裸粒（CK）提高，其中发芽率是CK的1.04倍，发芽势是CK的1.45倍，发芽指数是CK的1.53倍；配方2(吸水树脂∶花生壳粉∶凹凸棒土=5∶80∶15)、配方10(吸水树脂﹕花生壳粉﹕凹凸棒土=19∶66∶15)、配方21(吸水树脂∶花生壳粉∶凹凸棒土= 26∶52∶22)的种子出苗率分别较CK显著提高了23.8%、40.5%、22.6%；所有丸粒化配方幼苗的株高、最大叶长、叶面积均较CK有所提高；除配方20(吸水树脂﹕花生壳粉﹕凹凸棒土=12∶66∶22)、21外，其余配方幼苗鲜、干质量均较CK有所增加，尤其是配方4,显著高于CK。吸水树脂占比与抗压强度、吸水率、萌发特性相关指标呈极显著正相关，花生壳粉占比与种子萌发特性、幼苗生长情况相关指标均呈正相关，凹凸棒土、吸水树脂占比与种子萌发、幼苗生长相关指标均呈负相关性。综合考虑，配方4(吸水树脂∶花生壳粉∶凹凸棒土=12∶73∶15)为高丹草丸粒化制剂的最佳配方。

关键词: 高丹草, 种子, 丸粒化配方, 种子萌发, 幼苗生长