论文部分内容阅读
本文介绍了诊断玉米植株营养状况的几种指标，评价了各种指标的实用性和准确性，其中重点为叶片养分临界含量和综合诊断施肥法（ＤＲＩＳ）；提出了黄淮海地区玉米亩产７５０公斤以上时植株Ｎ、Ｐ、Ｋ、Ｃａ、Ｍｇ、Ｓ、Ｚｎ、Ｍｎ、Ｃｕ、Ｍｏ、Ｂ和Ｆｅ的养分临界含量，作为该地区高产玉米营养诊断指标；介绍了ＤＲＩＳ的特点、应用效果及ＤＲＩＳ指数计算公式。
In this paper, several indicators of the nutritional status of maize plants were introduced and the practicability and accuracy of various indicators were evaluated. The key points were the critical nutrient content of leaves and the integrated diagnostic fertilization (DRIS) method. The yield per mu of maize in Huang-Huai-Hai region was 750 The critical nutrient contents of N, P, K, Ca, Mg, S, Zn, Mn, Cu, Mo, B and Fe in the plant above kg were used as diagnostic indicators of high yield maize nutrition in this area. The characteristics, DRIS index calculation formula.