| 摘要: |
| 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。 |
| 关键词: 锌肥,分布规律,临界值,分级,土壤图,陕西省 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Survey of the Distridution of Soils Deficient in Zn and Application of Zn Fertilizer in Shaanxi province |
|
Zhu Kezhuang Wang Xuegui,Zhu Kezhuang Wang Xuegui
|
| Abstract: |
| Shaanxi falls into the soil region deficient in Zn in our country.The results from 280 experiments showed that there is a negative correlation between the effect of Zn fertilizer anb soil available Zn and the response of various crops to Zn is also different.The measured results of 5944 soil samples showed that the oultivated lands with available Zn content<0.5 M-g/g and with Zn fertilizer to be applied are 35.049 million mu, accounting for 62.5% of total cultivated lands.The distribution of the cultivated lands is as follows: the existing area deficient in Zn is. middle part of Shaanxi>northern Shaanxi>Southern Shaanxi,but the proportion of area Deficient in Zn is- Northern Shaanxi>Middle part of Shaanxi>Southern Shainxi.The distribution of soils deficient in Zn is consistent with the response of Zn fertilizer to various districts and once is also consistent with the state that the available soil Zn is higher in the south and lower in the north, anb CaCO3 content and pH value,are lower in the south and higher in the north. |
| Key words: Zn fertilizer, distribution regularity, critical value, grading, soil map, Shaanxi Province |
