The content of exchangeable Al increased with the amount of applied nitrogen as urea.
茶园土壤交换性铝含量随施氮量的提高而增加；
The increase amount of residual nitrate N from third harvesting to fifth harvesting was 51.6% of the total amount of applied nitrogen during this period.
从第三季作物收获到第五季作物收获，残留硝态氮的增加量占这一时期氮肥施用量的比例高达51.6%。
The applied amount of nitrogen had a significant effect on grain yield.
施氮量对杂交稻的产量形成和氮肥利用的影响十分明显。
应用推荐