论文部分内容阅读
牧草种子从发芽到最后成熟的整个生长发育过程中除了需要土壤、阳光、空气、水分、温度等生活条件以外,还需要多种营养元素,如碳、氢、氧、氮、磷、钾、钙、镁、硫、铁、锰、锌、铜、钼、硼、氯等。牧草需要的营养元素,不一定都要通过施肥来解决,比如碳、氢、氧可以从水中和空气中取得;某些微量元素牧草需要量极少,可以从土壤中取得,不需要通过施肥来补给;而氮、磷、钾牧草需要数量较多,其供应程度直接影响牧草的产量和品质,当土壤不
In addition to living conditions such as soil, sunlight, air, moisture and temperature, forage seeds require a variety of nutrients such as carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium and calcium throughout the growth and development process from germination to maturity , Magnesium, sulfur, iron, manganese, zinc, copper, molybdenum, boron, chlorine and the like. For example, carbon, hydrogen and oxygen can be obtained from water and air; some trace elements have little need of grass and can be obtained from soil without fertilization Supply; and nitrogen, phosphorus and potassium pasture needs a large number of its supply directly affects the yield and quality of forage, when the soil is not