论文部分内容阅读
陕西省属我国的缺锌土壤区。280个试验结果表明,施锌肥的效应与土壤有效锌含量呈负相关,且不同作物对锌的反应不同。5944个土样测定结果得出,全省有效锌含量<0.5μg/g,需施锌肥的缺锌土壤,有3504.9万亩耕地,占总耕地的62.5％。其分布状况:缺锌的实际面积为关中>陕北>陕南,缺锌面积的比例为陕北>关中>陕南。缺锌土壤的分布与不同地区(土壤)施锌肥的效应相吻合,也与土壤有效锌含量南高北低、碳酸钙含量及pH值南低北高的状况相一致。
Shaanxi Province is China’s zinc deficiency soil area. The results of 280 experiments showed that the effect of applying Zn fertilizer was negatively correlated with available Zn in soil, and the response of different crops to Zn was different. The results of 5,944 soil samples showed that the effective zinc content in the province was less than 0.5μg / g, and zinc deficient soil needing zinc fertilizer had 35,049,000 mu of cultivated land, accounting for 62.5% of the total cultivated land. The distribution of the situation: the actual area of zinc deficiency Guanzhong> North Shaanxi> South Shaanxi, the proportion of zinc deficiency area of northern Shaanxi> Guanzhong> Southern Shaanxi. The distribution of zinc-deficient soil agrees well with the effect of applying zinc fertilizer in different areas (soil), and is also consistent with the available zinc content of the soil in the north of South China, the content of calcium carbonate and the pH value of South China in the north.