Responses of water productivity to irrigation and N supply for hybrid maize seed production in an arid region of Northwest China
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Arid Land"
DOI: 10.1007/s40333-017-0017-3
Abstract: Water and nitrogen (N) are generally two of the most important factors in determining the crop productivity. Proper water and N managements are prerequisites for agriculture sustainable development in arid areas. Field experiments were conducted… read more here.
Keywords: hybrid maize; seed; irrigation; productivity ... See more keywords
Effects of drip irrigation nitrogen coupling on dry matter accumulation and yield of Summer Maize in arid areas of China
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DOI: 10.1016/j.fcr.2021.108321
Abstract: Abstract To explore the effects of irrigation and nitrogen on dry matter accumulation (DMA) and yield of summer maize in arid regions, field experiments were conducted in experimental plot in 2017 and 2018. There were… read more here.
Keywords: nitrogen; irrigation; yield; dry matter ... See more keywords
Reasonable Nitrogen Fertilizer Management Improves Rice Yield and Quality under a Rapeseed/Wheat–Rice Rotation System
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DOI: 10.3390/agriculture11060490
Abstract: To determine the influence of N fertilizer management on rice yield and rice quality under diversified rotations and establish a high-yield, high-quality, and environmentally friendly diversified planting technology, a rapeseed/wheat–rice rotation system for 2 successive… read more here.
Keywords: hm2; rice; wheat; yield ... See more keywords
北京西山不同海拔油松林PM 2.5 浓度及叶片吸附量变化规律
Sign Up to like & getrecommendations! Published in 2017 at "Acta Ecologica Sinica"
DOI: 10.5846/stxb201511112283
Abstract: 以北京西山不同海拔梯度油松人工林为研究对象，对油松林PM2.5浓度变化和叶片PM2.5吸附量进行分析，并应用电子显微镜对不同海拔油松叶表面微形态特征进行观察，阐释叶片吸附PM2.5差异。结果表明：随着海拔升高PM2.5质量浓度逐渐降低，不同海拔油松林PM2.5质量浓度日变化均呈典型的双峰曲线，7：00和19：00是一天的两个峰值，最小值出现在13：00-15：00左右；从不同月份看，不同海拔油松林PM2.5质量浓度最高值出现在冬季的2月，最低值在8月；不同海拔油松林PM2.5质量浓度全年均值为84 m（（102.28±18.44）μg/m3）> 110 m（（94.18±18.34）μg/m3）> 160 m（（81.53±19.23）μg/m3）> 230 m（（75.39±15.71）μg/m3）；随着海拔升高单位叶面积PM2.5吸附量逐渐减小，每升高50 m，单位叶面积PM2.5吸附量降低23.25%，每公顷PM2.5吸附量下降26.43%，不同海拔油松林每公顷PM2.5吸附量全年均值为84 m（（8.61±1.08）kg/hm2）> 110 m（（7.30±0.94）kg/hm2）> 160 m（（6.35±0.99）kg/hm2）> 230 m（（4.34±1.14）kg/hm2）；处于低海拔的油松叶表面较粗糙，气孔内部和周围聚集大量颗粒物，在叶面形态上更有利于吸附PM2.5，高海拔则相反。高海拔空气质量优于低海拔，低海拔的植物吸附颗粒物多于高海拔。研究结果可为城市造林和森林净化大气提供数据支持。 read more here.
Keywords: pm2 pm2; pm2; hm2;