施肥及种子包衣配方对沙地播种牧草幼苗生长的影响

Effects of fertilization and seed coating on the growth of planted herbage in sandy land

为了提高沙地播种耐旱牧草幼苗的存活率及生长,以呼伦贝尔沙地为研究对象,对沙地播种耐旱牧草进行不同施肥及种子包衣处理的试验。对播种植物地上和地下生物量、根系长度、高度、盖度和密度等进行了测定。结果表明:对播种牧草幼苗生长促进作用的肥种排序为:黄腐酸有机-无机复混肥>缓释肥>复合肥。其中,黄腐酸有机-无机复混肥更有利于混播牧草幼苗地上部分的生长,而缓释肥则有利于幼苗根系生长。建议呼伦贝尔沙地播种耐旱牧草的最佳种子包衣和施肥组合模式为:先对牧草种子进行基础材料包衣处理,然后播种时施加黄腐酸有机-无机复混肥或NPK缓释肥。

The research was conducted to improve the survival rate and growth of drought-tolerant herbage seedlings.In this study,Hulunbuir sandy land was taken as the research object.Different type of fertilization and seed coating treatments of drought-tolerant herbage sown in sandy land were carried out.The aboveground and underground biomass,root length,height,coverage and density of sown plants were measured.The results showed that the order of fertilizers for promoting seedling growth of sown herbage was as follows:fulvic acid organic-inorganic compound fertilizer>slow-release fertilizer>compound fertilizer.Fulvic acid organic-inorganic compound fertilizer was more conducive to the growth of aboveground parts of mixed herbage seedlings.The slow-release fertilizer was beneficial to the root growth of seedlings.It was suggested that the best combination of seed coating and fertilization for sowing drought-tolerant herbage in Hulunbuir sandy land should be:the grass seeds were first coated with basic materials and then sown with fulvic acid organic-inorganic compound fertilizer or NPK slow-release fertilizer.