锌锰钼配施技术在鸡脚草和百脉根混播草地中的应用

针对河南省土壤特点,锌锰钼肥的生理功能以及牧草生产利用中存在的问题,从2000年起对Zn、Mn和Mo肥3种微肥在鸡脚草(鸭茅)(DectylisglomerataL.)和百脉根(LotuscorniculatusL.)混播草地进行了应用性研究,详实地探讨三种微肥的应用范围和具体措施。研究证明:Zn肥对鸡脚草和百脉根混播草地的有效范围集中在200￣600mg/kg之间,最佳利用浓度为200￣400mg/kg,能够促进牧草光合作用和提高种子产量,对牧草生产没有影响。200mg/kg的Zn肥与500mg/kgMn肥和300mg/kg的Mo肥三者配施下,不但提高牧草的光合能力和种子产量,而且也显著地提高牧草产量(11.8%)。

Studies on Combined Application of Zn, Mn and Mo in Mixed Sowing Grassland

Based on soil conditions in Henan province,physiologic characters and existing question in grass production,this paper conducted many applied studies about three trace element fertilizers(ZnMn and Mo)in Mixed Sowing grassland consisting of Birdsfoot(Lotus corniculatus L.) and Orchardgrass(Dectylis glomerata L.),and analyzed applied ranges and concrete measures. The results showed that effective applied concentration of Zn fertilizer ranges from 200 to 600 mg/kg and optimum concentration ranges from 200 to 400 mg/kg which can promote grass photosynthesis and enhance seed yield, Combined Application of Zn, Mn and Mo can not only enhance photosynthetical ability and seed yield, but also promote forage production significantly (increasing by 11.8%) under the concentration of 200 mg/kg, 500 mg/kg and 300 mg/kg for Zn, Mn and Mo respectively.