论文部分内容阅读
锌是玉米必需的微量营养元素之一。农民所说的“孝苗”或“花白叶病”,就是玉米典型缺锌症状,在石灰(岩)性土壤不仅有所发生,而且有加重之势。我区由石灰岩母质发育的土壤有110.55万亩,约占全区旱地的40％,是种植玉米的主要农田。研究石灰(岩)性土壤玉米施锌肥技术,是生产上的紧迫课题。本文总结1982年以来,耕地土壤微量元素养分概查化验结果、30余份试验材料和示范推广应用经验,就此课题作如下探讨。 一、土壤有效锌的含量分布 本地区石灰(岩)性土壤有效锌(土壤pH>6.5)含量介于0.34～1.89ppm之间,均值为0.79±0.40ppm(n=22)。分布上有两个特点:一是行政区划的差异明显(表1)。
Zinc is one of the essential micronutrients for corn. The “filial piety” or “white leaf disease” farmers refer to is the typical symptom of zinc deficiency in maize. Not only occurs in limestone soil, but it also aggravates. In our district, there are 1,105,500 mu of soil with limestone parental material, accounting for about 40% of the dry land in the whole region, which is the main farmland for planting corn. Research lime (rock) corn soil fertilization of zinc technology, is an urgent issue in production. This article summarizes the survey results of soil nutrient trace elements in cultivated land since 1982, more than 30 test materials and demonstration and popularization and application experience, and discusses the subject as follows. First, the content of soil available zinc Distribution of lime (rock) soil available zinc (soil pH> 6.5) content ranged from 0.34 to 1.89ppm, with an average of 0.79 ± 0.40ppm (n = 22). Distribution has two characteristics: First, the obvious differences in administrative divisions (Table 1).