A trial of investigating impacts of nitrogen dressing at different stage on feeding value and physiological characteristics of forage summer maize (Ludan50) has been conducted by means of potted planting. The results ...A trial of investigating impacts of nitrogen dressing at different stage on feeding value and physiological characteristics of forage summer maize (Ludan50) has been conducted by means of potted planting. The results suggested that biomass yield, grains yield and feeding value of all treatments were significantly raised compared CK without nitrogen dressing. Nitrogen dressing at the jointing stage for one time could raise the dry matter yield in terms of biomass, thus improving feeding value. Separating total dose of dressing nitro-展开更多
文摘为了研究自然煤矸石充填复垦地和不同覆土厚度条件下不同颗粒级配煤矸石充填复垦地重构土壤理化性质及在其之上生长的玉米（Zea mays L.）的生理生态特性,以淮南创大“煤矸石充填复垦示范基地”为研究区域,通过分区分层采集实验区范围内土壤样品,检测并分析其主要营养元素及重金属含量,监测实验区内玉米各生理生态指标变化情况及其植株各部分的重金属含量,探究以不同颗粒级配煤矸石作为填充基质对其充填区域农作物的影响.实验结果表明：经过分选后的煤矸石作为填充基质比自然状态下的煤矸石填充基质具有较好的保水保肥性和透气性,尤其以70%-100%粒径为〈80 cm 的煤矸石作为填充基质的重构土壤培育的玉米,其各项生理生态指标均表现良好,说明该复垦方案更有利于玉米的生长.但两种以煤矸石作为主要填充基质的复垦方案都面临土壤中部分重金属含量超标和向植物体迁移的问题.如何降低重构土壤中重金属含量,减少土壤中重金属向植物体内的迁移将成为今后研究的重点.
文摘A trial of investigating impacts of nitrogen dressing at different stage on feeding value and physiological characteristics of forage summer maize (Ludan50) has been conducted by means of potted planting. The results suggested that biomass yield, grains yield and feeding value of all treatments were significantly raised compared CK without nitrogen dressing. Nitrogen dressing at the jointing stage for one time could raise the dry matter yield in terms of biomass, thus improving feeding value. Separating total dose of dressing nitro-
