不同氮肥用量对膜下滴灌春玉米光合特性及产量的影响

Effects on Photosynthetic Characteristics and Yield in Drip Rirrigation of Spring Maize Which Are Given Different Nitrogen Application

以厚德198为试验玉米品种,2011年在内蒙古通辽市开发区研究了不同氮肥用量对膜下滴灌春玉米光合特性及产量的影响.结果表明,叶面积指数、叶绿素a、叶绿素b和叶绿素a+b在吐丝期之后均呈逐渐下降的变化趋势,叶绿素a/b吐丝—吐丝后42天逐渐减小,而后略有升高.在不同氮肥水平下,N280叶面积指数、叶绿素a和叶绿素b表现均较高,对吐丝后各时期光合特性与产量相关分析,叶绿素a、叶绿素b、叶绿素a+b和叶面积指数在吐丝后48天内均与产量达到显著水平.从产量结果来看,以N280最高,是试验地区膜下滴灌春玉米高产栽培适宜的氮肥管理模式.

Study on the influence of Houde 198 spring maize＇s photosynthetic characteristics and yield by different nitrogen fertilizer strategies under the condition of drip irrigation in Tong Liao Development of Inner Mongolia in 2011.The results show that leaf area index,chlorophyll a,chlorophyll b and chlorophyll a ＋ b in the sulking stage all showed a gradual decline.And the level of chlorophyll a / b has the same trend between the period of the beginning of sulking and 42 days after sulking,and then there is a slight rise.N280＇s leaf area index,chlorophyll a and chlorophyll b all have a high performance in all different nitrogen levels.Have analysis with photosynthetic characteristics and yield after sulking for each period ：chlorophyll a,chlorophyll b,chlorophyll a ＋ b and leaf area index are all related to yield,which reached a significant level in the sulking stage after the 48 days.From the structure of yield we can see that the condition of N280 is the most suitable for cultivation of spring maize in order to have a good yield under the condition of drip irrigation.