2) synthetic nitrogen fertilizer application
施用化学氮肥
1.
,synthetic nitrogen fertilizer application,no-tillage and conservation tillage,irrigation,straw return,manuring and sewage sludge application) for net mitigation based on their soil carbon sequestration and impacts on the GHG leakage.
综述总结了目前较受重视的一些农田措施(包括施用化学氮肥、免耕和保护性耕作、灌溉、秸秆还田、施用禽畜粪便以及污灌)的土壤固碳潜力,温室气体泄漏和净减排潜力研究成果。
3) N rate
氮肥用量
1.
Field experiments, with winter wheat as test crop, were carried out to study the effects of N application and cultivation methods on crop growth and nutrient utilization at different N rates and under different methods of cultivation.
水分和土壤养分是制约我国西北旱地小麦增产的主要因素,选择合适的氮肥用量和栽培模式是提高小麦产量和养分吸收的关键。
6) N application rates
氮肥用量
1.
Effects of N application rates and NPK combined fertilization on hybrid milletgrass growth and yield;
氮肥用量及氮、磷、钾配合施用对小米草生长和产量的影响
2.
Effect of N application rates on leaf senescence and its mechanism in maize was studied by methods of field experiment, plant analysis and electron microscopy examination.
采用田间试验、植株分析及电镜检测方法研究了氮肥用量对玉米叶片衰老的影响及其机制。
补充资料：工程化学障碍物(见化学障碍物)
工程化学障碍物(见化学障碍物)
engineering-chemical obstacle
习U·上日、11匕I一9 nuQXue Zhang’aiwu工程化学障碍物(engineelsng一ehemiealobstacle)见化学障碍物。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条