最后分析了浓磷酸中的杂质含量对磷酸二铵产品总养分的影响。
Then the effects of the impurities in concentrated phosphoric acid on the nutrient content in diammonium phosphate are discussed.
下面的日粮大约含有18%的粗蛋白和80%的可消化总养分（干物质基础）。
The following ration will contain approximately 18%crude protein and 80% TDN on a DM basis.
大多数土壤速效养分的半方差结构明显，结构性方差占总方差的比例均在50%以上。
The semi-variation structure for most soil available nutrients was obvious and the rate of structural variation accounted for more than 50% of the total variation.
结果表明，地下部储存的养分占总积累的比重较大。同时叶部养分向树体转移能力较强。
The results show that larger proportion of nutrient is stored in root and more nutrients can transfer from leaf to stem.
不同土地利用方式，其径流养分输出占系统养分总输出的比例明显不同。
In different land use systems, the percent of nutrient output in runoff is different.
农田生态系统中氮素养分主要的输入项是化肥和有机肥，分别占总投入氮量的58.8%和25.3%。
The major input of N was the N of fertilizer and manure and the percentage was 58.85% and 25.32% of the total input respectively.
超高产夏玉米吐丝后氮素吸收积累量占总积累量的40.30%-47.78%，保证后期氮素养分充足供应对于夏玉米达到超高产水平至关重要；
The N absorption proportion after silking stage was 40.30%-47.78% of the total, so it was important to provide maize plants with sufficient N in later growth stage for realizing super-high-yield.
超高产夏玉米吐丝后氮素吸收积累量占总积累量的40.30%-47.78%，保证后期氮素养分充足供应对于夏玉米达到超高产水平至关重要；
The N absorption proportion after silking stage was 40.30%-47.78% of the total, so it was important to provide maize plants with sufficient N in later growth stage for realizing super-high-yield.
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