主要养分 meaning in English
macronutrient
Examples
- Nitrogen , phosphate and potassium were main nutrients studied
氮、磷、钾是研究的主要养分。 - Most highly weathered and leached upland soils in s . e asia are so deficient in primary nutrients that economic yields of healthy crops cannot be produced , unless nutrients are added to the soil
东南亚大多数高度风化和淋溶的旱地土壤主要养分贫乏，以致除非向土壤施加养分，否则不可能获得健康作物的经济产量。 - Mongolica , soil acidity , humus component content , available k , total p , organic p , inorganic p , enzyme activity , and microbe amount of young stand olgensis of the second rotation of larix olgensis in non - rhizosphere soil also
不同发育阶段影响林木生长量的主要养分因子是土壤有机质、速效钾、水解氮以及土壤磷形态的全磷、有机磷、无机磷总量、有效磷、 ca一p和fe一p 。 - The organic matter , total n , hydrolytic n were increased , then reduced with the increase of abandoned time . the loss of organic c got up to 59 . 4 % in abandoned land . in 0 - 20cm , the sand content of 0 . 25 - 0 . 05mm was increased gradually , the average content of sand in the abandoned land was up to 76 . 84 % , the sand contents of silt and sand was gradually reduced , the soil mechanic compose became coarse
随撂荒年限的增加，土壤有机质、全氮、碱解氮等主要养分均表现出先降低后增加的趋势；撂荒地有机碳的损失平均达到59 . 4 ；在撂荒地表面0 - 20cm范围内， 0 . 25 - 0 . 05mm粒径的砂粒含量逐渐增加，各撂荒地砂粒平均含量达76 . 84 ，粉粒和粘粒含量逐渐降低，土壤机械组成出现粗化现象。 - For this purpose , a systematic approach for soil nutrient status study was developed , which consists of five steps : ( 1 ) proper sampling and sample preparation , ( 2 ) basic analysis of soil sample for availability of 11 essential nutrients , ( 3 ) adsorption of soils to important nutrients , ( 4 ) greenhouse study to identify the nutrient limiting factors and ( 5 ) field experiment ( hunter , 1984 ; portch , 1988 )
为此目的，我国有关专家新近旨进了一套研究土壤养分状况的系统方法，该方法分五个步骤： （ 1 ）正确的采样和样品制备； （ 2 ）土样中11种必需营养元素速效含量的测定； （ 3 ）土壤对主要养分的吸附； （ 4 ）验证养分限制因子的温室研究； （ 5 ）田间试验。