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锌是植物正常生长、发育所必需的微量元素之一,国内外资料一般把小麦列为对锌不敏感作物。我们自1976年开始发现小麦缺锌症状,严重影响小麦品质和产量。自此我们连续7年进行小麦施锌试验,取得良好效果。1981—1983年三年内已示范推广小麦施锌面积达140多万亩,共增产小麦1亿多斤,经济收益达1,800多万元。缺锌症状及诊断小麦缺锌症多发生在砂姜黑土上。这类土壤含有效氮100ppm以上,五氧化二磷高于40ppm,有效钾201.4ppm,有效锌仅0.28ppm(远远低于临界值0.6ppm)。在挑旗期分析病株含锌量11.75ppm,只为正常植株的60％左右。
Zinc is one of the trace elements necessary for the normal growth and development of plants. Domestic and foreign data generally list wheat as insensitive to zinc. We have discovered the symptoms of zinc deficiency in wheat since 1976, seriously affecting wheat quality and yield. Since then, we have conducted zinc test for wheat for seven consecutive years and achieved good results. During the three years 1981-1983, a total area of more than 1.4 million hectares of wheat has been demonstrated and popularized, with a total increase of more than 100 million kg of wheat and an economic gain of over 18 million yuan. Zinc deficiency symptoms and diagnosis of zinc deficiency occurred in Shajiang black soil. This type of soil contains more than 100 ppm available nitrogen, more than 40 ppm phosphorus pentoxide, 201.4 ppm available potassium and 0.28 ppm available zinc (well below the threshold of 0.6 ppm). In the flag period analysis of diseased plants zinc content of 11.75ppm, only about 60% of normal plants.