中国土壤与肥料
中國土壤與肥料
중국토양여비료
SOIL AND FERTILIZER SCIENCES IN CHINA
2015年
3期
34-39,119
,共7页
李俊霞%杨俐苹%白由路%王磊
李俊霞%楊俐蘋%白由路%王磊
리준하%양리평%백유로%왕뢰
玉米%光谱反射率%SPAD 值%氮含量%相关性分析
玉米%光譜反射率%SPAD 值%氮含量%相關性分析
옥미%광보반사솔%SPAD 치%담함량%상관성분석
maize%spectral reflection%SPAD value%leaf nitrogen content%correlation analysis
为明确不同玉米品种 SPAD 值及光谱反射率进行氮素营养诊断的可行性,以华北地区的6个主要玉米杂交品种中单909、隆平206、郑单958、金赛06-9、农华101与登海605为材料,设置0.04、0.4、2.0和4.0 mmol/ L 4个氮水平的砂培试验,研究了玉米拔节期氮含量、叶片光谱反射率及 SPAD 值的处理间差异,及其不同氮水平下玉米氮含量与叶片550 nm 处的光谱反射率及 SPAD 值的相关性。结果表明:来源于氮水平的变异远高于品种及二者交互作用引起的变异,植株氮含量与叶片550 nm 处的光谱反射率呈显著负相关关系(R =-0.8088),氮含量与 SPAD 值存在极显著的正相关性(R =0.8956)。因此,通过 SPAD 值及光谱反射率对华北地区玉米杂交种进行氮素营养诊断是可行的,且用 SPAD 值来诊断氮素营养状况要比光谱反射率的精确度高。
為明確不同玉米品種 SPAD 值及光譜反射率進行氮素營養診斷的可行性,以華北地區的6箇主要玉米雜交品種中單909、隆平206、鄭單958、金賽06-9、農華101與登海605為材料,設置0.04、0.4、2.0和4.0 mmol/ L 4箇氮水平的砂培試驗,研究瞭玉米拔節期氮含量、葉片光譜反射率及 SPAD 值的處理間差異,及其不同氮水平下玉米氮含量與葉片550 nm 處的光譜反射率及 SPAD 值的相關性。結果錶明:來源于氮水平的變異遠高于品種及二者交互作用引起的變異,植株氮含量與葉片550 nm 處的光譜反射率呈顯著負相關關繫(R =-0.8088),氮含量與 SPAD 值存在極顯著的正相關性(R =0.8956)。因此,通過 SPAD 值及光譜反射率對華北地區玉米雜交種進行氮素營養診斷是可行的,且用 SPAD 值來診斷氮素營養狀況要比光譜反射率的精確度高。
위명학불동옥미품충 SPAD 치급광보반사솔진행담소영양진단적가행성,이화북지구적6개주요옥미잡교품충중단909、륭평206、정단958、금새06-9、농화101여등해605위재료,설치0.04、0.4、2.0화4.0 mmol/ L 4개담수평적사배시험,연구료옥미발절기담함량、협편광보반사솔급 SPAD 치적처리간차이,급기불동담수평하옥미담함량여협편550 nm 처적광보반사솔급 SPAD 치적상관성。결과표명:래원우담수평적변이원고우품충급이자교호작용인기적변이,식주담함량여협편550 nm 처적광보반사솔정현저부상관관계(R =-0.8088),담함량여 SPAD 치존재겁현저적정상관성(R =0.8956)。인차,통과 SPAD 치급광보반사솔대화북지구옥미잡교충진행담소영양진단시가행적,차용 SPAD 치래진단담소영양상황요비광보반사솔적정학도고。
In order to determine the feasibility of SPAD value and hyper-spectra data of different maize varieties to diagnose nitrogen nutrition status, it was studied that the variation of total nitrogen content, leaf spectral reflectance, SPAD values and the correlation of total nitrogen with leaf spectral reflectance and SPAD values in six maize varieties such as Zhongdan 909, Longping 206, Zhengdan 958, Jinsai 06-9, Nonghua 101 and Denghai 605 in Huabei region by sand culture with four nitrogen levels (0. 04, 0. 4, 2. 0, 4. 0 mmol/ L N). Results showed that, in the shooting stage, variation between nitro-gen level was far greater than the varieties and the interaction between the two factors. The correlation between spectral re-flectance at 550 nm and nitrogen content was significant negative (R = - 0. 808 8), the SPAD values and nitrogen content had a significant positive correlation (R = 0. 895 6). So it is feasible to observe maize nutrient with the hyper-spectra data and SPAD value in Huabei area, and to diagnose nitrogen nutrition status, using SPAD value is more accurate than using the hyper-spectra data.