建德县农业局王理玉、建德县农资公司吴仁泉对本刊来稿,介绍小麦根外喷锰肥有增产效果。来稿认为锰在土壤中含量有差异,如我国北方的石灰性土壤易缺锰,而南方酸性土壤含锰量却较高。但是在酸性土壤上施用大量石灰后,也会使交换态锰减少,如果再加上有机质少、土壤质地轻、通透性良好更会导致诱发性缺锰。因此,此时施上锰肥就有一定的效果。倘若土壤酸碱度在8以上,施锰肥效果就更好。 Jiande County Bureau of Agriculture Wang Lilu, Jiande County Agricultural Investment Company Wu Renquan draft of this publication, introduction of wheat root spraying manganese fertilizer yield increase. Contributions that manganese content in the soil are different, such as northern China, calcareous soil susceptible to manganese, while the southern acidic soil manganese content is higher. However, applying large amounts of lime to acid soils also results in less exchangeable manganese, which, coupled with less organic matter, light soil texture and good permeability, can lead to induced manganese deficiency. Therefore, there is a certain effect when applying manganese fertilizer. If the soil pH is above 8, the effect of manganese fertilizer is better.