论文部分内容阅读
本文报道,在成龄胶树施用硫酸铵、氯化钾、磷矿石粉、硫镁矾和白云石粉的时间,对于胶树叶片养分含量的影响的试验结果。在越科落叶期或长叶后施用这些肥料。就叶片氮、钾养分状现的改进来说,在越冬落叶期施用硫酸铵和氯化钾,比在完成长叶后施用更为有效。磷矿石粉似乎以在长叶后施用较好。施用硫镁矾和白云石粉的时间对于叶片的养分状况没有什么影响。联系这些结果讨论了施用常规混合肥和补救营养缺乏的特种肥料的时间。
This paper reports the experimental results on the effect of the plasticizer on the nutrient content of the leaves of the plastic tree in the time of application of ammonium sulfate, potassium chloride, phosphate rock, kieserite and dolomite powder. These fertilizers are applied after the more deciduous or long leaves. In terms of the present improvement of leaf nitrogen and potassium nutrition, it is more effective to apply ammonium sulfate and potassium chloride in the late deciduous period than after the long leaf is finished. Phosphate rock powder appears to be better applied after long leaves. The time for the application of thionite and dolomite did not have any effect on the nutrient status of the leaves. These results are discussed in connection with the timing of application of conventional fertilizers and special fertilizers to remediate nutrient deficiencies.