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.
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.
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.
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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