Nutritive ingredients accumulation amounts showed remarked difference under different density and applying nitrogenous fertilizer quantity.
营养物质积累量在不同密度和施氮量下存在较大差异。
The nutritive peculiarities of crops, fertilizer and soils are described. Meanwhile the nutrient balances of farmland in several typical areas of China are also estimated.
对农作物、化肥和我国土壤营养特性作了简要描述，并对全国和几个典型地区的农田养分平衡作了估算。
The nutritive ingredients content on the whole plant raw material and its accumulation amount showed remarked difference under different density and applying nitrogenous fertilizer quantity.
不同密度和施氮处理下全株原料营养物质含量及其积累量有较大差异。
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