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二、作物体内养分测定 (一)作物体内氮素的测定 1.硝态氮的测定(硝酸试粉法): ①测定原理:利用硝酸试粉中的锌在酸性条件下产生氢,把NO_3~-离子还原成N02一离子,NOZ一离子则与对氨
Determination of Nutrients in Crops (I) Determination of Nitrogen in Crops 1. Determination of Nitrate Nitrogen (Test Method of Nitric Acid): ①Measurement Principle: The zinc in test powder of nitric acid is used to produce hydrogen under acidic conditions, - Ionic reduction of ions to N02, NOZ ions and ammonia