Chlorophyll meter as nitrogen management tool in malting Barley
Chlorophyll meter as nitrogen management tool in malting Barley
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叶绿素计作为啤酒大麦氮管理工具
DOI：
10.1080/00103629909370394
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发表时间：
1999
影响因子：
1.8
通讯作者：
J. M. Krupinsky
中科院分区：
文献类型：
--
作者：
B. Wienhold;J. M. Krupinsky
摘要在许多地区，降水量的变化使得预测啤酒大麦的产量目标和氮（N）用量变得困难。在低于正常生长季节降水量的年份，以推荐的施肥量施肥的大麦通常表现出谷物蛋白质浓度超过制麦芽可接受的浓度。进行了一项研究，以评估叶绿素计作为氮管理工具。在大田条件下，对大麦进行了不同氮素水平的试验。叶绿素计读数和N添加量在Haun 4至5生长阶段进行，并在成熟时评估谷物产量和蛋白质浓度。叶绿素计读数，归一化为仪表阅读从处理区除以从一个地块接受全N处理在Haun 4至5生长阶段，与粮食产量（r2=0.67）。标准化叶绿素仪读数低于95%的立场，响应N添加与产量相当于充分施肥的立场和粮食蛋白质浓度…
Abstract Variable precipitation in many regions makes it difficult to predict yield goals and nitrogen (N) rates for malting grade barley (Hordeum vulgare L.). During years with below normal growing season precipitation, barley fertilized at the recommended rate often exhibits grain protein concentrations exceeding what is acceptable for malting. A study was conducted to evaluate the chlorophyll meter as a N management tool. Barley was grown under several N rates in the field. Chlorophyll meter readings and N additions were made at the Haun 4 to 5 growth stage, and grain yield and protein concentrations were evaluated at maturity. Chlorophyll meter readings, normalized as meter reading from treatment plot divided by that from a plot receiving a full N treatment at the Haun 4 to 5 growth stage, were correlated with grain yield (r2=0.67). Stands having normalized chlorophyll meter readings below 95% responded to N additions with yields equivalent to the fully fertilized stand and grain protein concentration...