氮肥及重金屬對水稻幼苗生長及反射光譜之影響

林盈茹

doi:10.6342/NTU201702250

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氮肥及重金属对水稻幼苗生长及反射光谱之影响

The effect of nitrogen and heavy metals on reflectance spectra of rice seedlings

林盈茹 , 硕士　　导师：黄文达　　共同指导教授：杨棋明

繁体中文 DOI： 10.6342/NTU201702250

重金属；反射光谱；水稻幼苗；氮素；植生指数；遥感探测； heavy metal ； reflectance spectra ； rice seedlings ； nitrogen ； vegetation index ； remote sensing

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摘要 │ 参考文献 (231) │ 国际计量

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Heavy metal Contamination of soils has been a widespread occurrence since anthropogenic activities began. Because heavy metals are non-degradable, their concentrations in soils significantly go beyond regulatory standards. Due to many factors affecting heavy metal availability in the soil, and many sources of heavy metal pollution, heavy metal content in crop may be excessive even though heavy metal concentration in soils meets the regulatory standard. Thus, we would like to create indices using reflectance spectra to perform non-destructive estimation of bioavailable heavy metal concentrations in soils and accumulation concentration in shoots. In this research, hydroponic rice (Oryza sativa L. cv. Tainan 11 and Taiken 14) seedlings were treated with treatment combinations of three nitrogen concentrations (50,100, and 200 ppm) and six heavy metal concentrations (Ni: 0, 10, 20 and 40 μM; Cd: 0, 50, 100 and 200 μM; Cu: 0, 10, 20 and 40 μM; Zn: 0, 1000, 2000 and 4000 μM; Cr: 0, 100, 200 and 500 μM; Pb: 0, 100, 200 and 500 μM) to simulate the effects of heavy metals in soil solution on rice seedlings under different nitrogen management in the field. The reflectance spectra of leaves were recorded and used to calculate vegetation indices to observe the relation between vegetation index and the heavy metal treatment concentration or the relation between vegetation index and heavy metal concentration in shoots. The result indicated that heavy metal stress inhibited shoot length of rice seedlings. In high heavy metal concentration, the reflectivity in green light and red light increased and blue shift of red edge happened at the same time. In addition, the reflectivity in green light and red light decreased in high nitrogen concentration, and red shift of red edge happened at the same time. The linear model and quadratic model were constructed from the relation between heavy metal concentration of shoots and vegetation index or the relation between heavy metal treatment concentration and vegetation index. The result showed that quadratic model has more significant correlation in both sets of variables. Therefore, it appears possible to create indices using reflectance spectra for non-destructive estimation of bioavailable heavy metal concentration in soils and accumulation concentration in shoots.

参考文献 ( 231 ) 〈TOP〉

郭鸿裕、刘沧棽、江志峰。2010。作物 (水稻) 吸收土壤重金属镉机制与农产品安全之影响。技术服务，21(3)，页12-14。
连结：
刘黔兰。2002。台湾中部水稻与土壤中镍之研究。农林学报，51(1)，页57-71。
连结：
谢庆芳。1990。土壤中镉含量与水稻植物体不同部位镉浓度变化之研究。台中区农业改良场研究汇报，29，页11-27。
连结：
Abdel-Ghany, S. E., & Pilon, M. (2008). MicroRNA-mediated systemic down-regulation of copper protein expression in response to low copper availability in Arabidopsis. Journal of Biological Chemistry, 283(23), 15932-15945.
连结：
Agami, R. A., & Mohamed, G. F. (2013). Exogenous treatment with indole-3-acetic acid and salicylic acid alleviates cadmium toxicity in wheat seedlings. Ecotoxicology and Environmental Safety, 94, 164-171.
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使用DOI作为永久连结

引用含有DOI的文献

DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。 如想对DOI的使用与概念有进一步了解，请参考 （ ） 。

DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。如想对DOI的使用与概念有进一步了解，请参考（）。