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The impact of relative humidity, genotypes and fertilizer application rates on panicle, leaf temperature, fertility and seed setting of rice

  • C. YAN (a1), Y. DING (a1), Q. WANG (a1), Z. LIU (a1), G. LI (a1), I. MUHAMMAD (a1) and S. WANG (a1)...


A series of field and plant growth chamber experiments were conducted in 2006 and 2007 to study how relative humidity (RH), genotypes and nitrogen application rates affect organ temperatures and spikelet fertility rates in rice. It was observed that organ temperatures varied with air temperature, RH, genotype and nitrogen application rate. Increases in RH at constant air temperature and increasing air temperature with a constant RH both increased organ temperatures significantly. Cultivars also exhibited differences in organ temperatures; those cultivars with erect panicles recorded lower organ temperatures than those with droopy panicles under similar climatic conditions. Similarly, cultivars with panicles above the flag leaf had lower temperatures at the panicle when compared to those plants with the panicle below the flag leaf. It was also found that panicle temperature showed a significant negative correlation with both grain filling rate and seed setting rate. Spikelet fertility could be maintained by reducing spikelet temperature under decreasing RH in a high-temperature environment. Panicle fertilizer application rates had a significant effect on the organ and canopy temperatures. The canopy temperature of rice grown with an ample supply of nitrogen was generally cooler than the canopy temperature of a nitrogen-deficient treatment.


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Ainsworth, E. A. (2008). Rice production in a changing climate: a meta-analysis of responses to elevated carbon dioxide and elevated ozone concentration. Global Change Biology 14, 16421650.
Ajayi, A. E. & Olufayo, A. A. (2004). Evaluation of two temperature stress indices to estimate grain sorghum yield and evapotranspiration. Agronomy Journal 96, 12821287.
Amani, I., Fischer, R. A. & Reynolds, M. P. (1996). Canopy temperature depression association with yield of irrigated spring wheat cultivars in hot climate. Journal of Agronomy and Crop Science 176, 119129.
Ayeneh, A., van Ginkel, M., Reynolds, M. P. & Ammar, K. (2002). Comparison of leaf, spike, peduncle and canopy temperature depression in wheat under heat stress. Field Crops Research 79, 173184.
Baker, J. T., Gitz, D. C., Payton, P., Wanjura, D. F. & Upchurch, D. R. (2007). Using leaf gas exchange to quantify drought in cotton irrigated based on canopy temperature measurements. Agronomy Journal 99, 637644.
Blum, A., Mayer, J. & Gozlan, G. (1982). Infrared thermal sensing of plant canopies as a screening technique for dehydration avoidance in wheat. Field Crops Research 5, 137146.
Blum, A., Shpiler, L., Golan, G. & Mayer, J. (1989). Yield stability and canopy temperature of wheat genotypes under drought stress. Field Crops Research 22, 289296.
Bouman, B. A. M., Feng, L. P., Tuong, T. P., Lu, G. A., Wang, H. Q. & Feng, Y. H. (2007). Exploring options to grow rice using less water in northern China using a modelling approach II. Quantifying yield, water balance components, and water productivity. Agricultural Water Management 88, 2333.
Childs, N. W. (2004). Production and utilization of rice. In Rice Chemistry and Technology, 3rd edn (Ed. Champagne, E. T.), pp. 123. St. Paul, MN: AACC.
Choudhury, B. (1985). A note on canopy and air temperature equality. Agricultural and Forest Meteorology 34, 333336.
Ehrler, W. L. (1973). Cotton leaf temperatures as related to soil water depletion and meteorological factors. Agronomy Journal 65, 404409.
Erda, L., Wei, X., Hui, J., Yinglong, X., Yue, L., Liping, B. & Liyong, X. (2005). Climate change impacts on crop yield and quality with CO2 fertilization in China. Philosophical Transactions of the Royal Society B 360, 21492154.
FAO. (2002). World Agriculture: Towards 2015/2030 Summary Report. Rome, Italy: FAO. (verified 5 October 2009)
Ferguson, H., Eslick, R. F. & Aase, J. K. (1973). Canopy temperature of barley as influenced by morphological characteristics. Agronomy Journal 65, 425428.
Fischer, R. A., Rees, D., Sayre, K. D., Lu, Z. M. & Condon, A. G. (1998). Wheat yield progress associated with a higher stomatal conductance and photosynthetic rate, and cooler canopies. Crop Science 38, 14671475.
Fukuoka, M., Tani, H., Iwama, K., Hasegawa, T. & Jitsuyama, Y. (2003). Difference between canopy temperature and air temperature as a criterion for drought avoidance in crop genotypes under field conditions in Japan. Japanese Journal of Crop Science 72, 461470.
Ge, D. K., Jin, Z. Q., Shi, C. L. & Gao, L. Z. (2002). Gradual impacts of climate change on rice production and adaptation strategies in southern China. Jiangsu Journal of Agricultural Science 18, 18.
Hatfield, J. L. (1982). The utilization of thermal infrared inputs from grain sorghum as methods of assessing irrigation requirements. Irrigation Science 3, 259268.
Hatfield, J. L., Quinsenberry, J. E. & Dilbeck, R. E. (1987). Use of canopy temperature to identify water conservation in cotton germplasm. Crop Science 27, 269273.
He, C. X., Bai, S. N. & Tan, K. H. (1998). Effects of high temperature on decreasing seed setting rate of photoperiod-sensitive genic male sterile (PGMS) rice and ordinary rice. Hybrid Rice 13, 2932.
Houghton, J. T., Ding, Y., Griggs, D. J., Noguer, M., van der Linden, P. J., Dai, X., Maskell, K. & Johnson, C. A. (2001). Climate Change 2001 – the Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK: Cambridge University Press/IPCC.
Howell, T. A., Musick, J. T. & Tolk, J. A. (1986). Canopy temperature of irrigated winter wheat. Transactions of the ASAE 29, 16921699.
Jackson, R. D., Idso, S. B., Reginato, R. J. & Pinter, P. J. (1981). Canopy temperature as a crop water stress index. Water Resources Research 17, 11331138.
Krishnan, P. & Surya Rao, A. V. (2005). Effects of genotype and environment on seed yield and quality of rice. The Journal of Agricultural Science, Cambridge 143, 283292.
Krishnan, P., Swain, D. K., Chandra Bhaskar, B., Nayak, S. K. & Dash, R. N. (2007). Impact of elevated CO2 and temperature on rice yield and methods of adaptation as evaluated by crop simulation studies. Agriculture, Ecosystems and Environment 122, 233242.
Lou, W. P., Zhang, H., Sun, Y. F., Zhan, W. X., Yu, Y. F. & Wu, R. (2006). Effects of sunlight and temperature conditions on heading period and seed setting rate of late rice. Chinese Journal of Agrometeorology 27, 4952.
Mackill, D. J. & Coffman, W. R. (1983). Inheritance of high temperature tolerance and pollen shedding in a rice cross. Zeitschrift fur Pflanzenzuchtung 91, 6169.
Maclean, J. L., Dawe, D. C., Hardy, B. & Patel, G. P. (2002). Rice Almanac: Source Book for the Most Important Economic Activity on Earth, 3rd edn.Oxon, UK: CABI Publishing/IRRI.
Matsui, T., Kobayasi, K., Yoshimoto, M. & Hasegawa, T. (2007). Stability of rice pollination in the field under hot and dry conditions in the Riverina Region of New South Wales, Australia. Plant Production Science 10, 5763.
Matsui, T., Omasa, K. & Horie, T. (1997). High temperature-induced spikelet sterility of Japonica rice at flowering in relation to air temperature, humidity and wind velocity conditions. Japanese Journal of Crop Science 66, 449455.
Matsui, T., Omasa, K. & Horie, T. (2000). High temperature at flowering inhibits swelling of pollen grains, a driving force for thecae dehiscence in rice (Oryza sativa L.). Plant Production Science 3, 430434.
Matsui, T., Omasa, K. & Horie, T. (2001). The difference in sterility due to high temperature during the flowering period among japonica-rice varieties. Plant Production Science 4, 9093.
Peng, S. B., Huang, J. L., Sheehy, J. E., Laza, R. C., Visperas, R. M., Zhong, X., Centeno, G. S., Khush, G. S. & Cassman, K. G. (2004). Rice yield decline with higher night temperature from global warming. Proceedings of the National Academy of Sciences of the United States of America 101, 99719975.
Prasad, P. V. V., Boote, K. J., Allen, L. H., Sheehy, J. E. & Thomas, J. M. G. (2006). Species, ecotype and cultivar differences in spikelet fertility and harvest index of rice in response to high temperature stress. Field Crops Research 95, 398411.
Reynolds, M. P., Balota, M., Delgado, M. I. B., Amani, I. & Fischer, R. A. (1994). Physiological and morphological traits associated with spring wheat yield under hot, irrigated conditions. Australian Journal of Plant Physiology 21, 717730.
Royo, C., Villegas, D., Garcia Del Moral, L. F., Elhani, S., Aparicio, N., Rharrabti, Y. & Araus, J. L. (2002). Comparative performance of carbon isotope discrimination and canopy temperature depression as predictors of genotypes differences in durum wheat yield in Spain. Australian Journal of Agricultural Research 53, 561569.
Satake, T. & Yoshida, S. (1978). High temperature-induced sterility in indica rice at flowering. Japanese Journal of Crop Science 47, 6–10.
Seligman, N. G., Loomis, R. S., Burke, J. & Abshahi, A. (1983). Nitrogen nutrition and canopy temperature in field-grown spring wheat. The Journal of Agricultural Science, Cambridge 101, 691697.
Shimono, H., Okada, M., Yamakawa, Y., Nakamura, H., Kobayashi, K. & Hasegawa, T. (2008). Rice yield enhancement by elevated CO2 is reduced in cool weather. Global Change Biology 14, 276284.
Solomon, S., Qin, D., Manning, M., Chen, Z., Marquis, M., Averyt, K. B., Tignor, M. & Miller, H. L. (2007). The Physical Science Basis: Summary for Policymakers. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK: Cambridge University Press/IPCC.
Vargas, M., Crossa, J., Reynolds, M. P., Dhungana, P. & Eskridge, K. M. (2007). Structural equation modeling for studying genotype×environment interactions of physiological traits affecting yield in wheat. The Journal of Agricultural Science, Cambridge 145, 151161.
Wang, G. (2005). The meteorological condition analysis for the constitution factors of the output of the hybrid early rice in Haikou region. Guangxi Journal of Meteorology 26, 4142.
Wanjura, D. F., Upchurch, D. R. & Mahan, J. R. (1995). Control of irrigation scheduling using temperature-time thresholds. Transactions of the ASAE 38, 403409.
Weerakoon, W. M. W., Maruyama, A. & Ohba, K. (2008). Impact of humidity on temperature induced grain sterility in rice (Oryza sativa L.). Journal of Agronomy and Crop Science 194, 135140.
Xu, Z. J., Chen, W. F., Zhang, L. B. & Yang, S. R. (1990). Comparative study on light distribution in rice canopies with different panicle types. Scientia Agricultura Sinica 23, 1016.
Yoshimoto, M., Oue, H., Takahashi, H. & Kobayashi, K. (2005). The effects of FACE (Free-Air CO2 Enrichment) on temperatures and transpiration of rice panicles at flowering stage. Journal of Agricultural Meteorology 60, 597600.
Zhang, B., Zheng, J. C., Yang, F., Tian, Y. L., Peng, L., Li, M. A., Bian, X. M. & Zhang, W. J. (2007 a). Effects of fertilization level on panicle temperature at heading stage of rice. Chinese Journal of Rice Science 21, 191196.
Zhang, Q. (2007). Strategies for developing green super rice. Proceedings of the National Academy of Sciences 104, 1640216409.
Zhang, W. Z., Han, Y. D., Du, H. J., Huang, R. D. & Chen, W. F. (2007 b). Relationship between canopy temperature and soil water content, yield components at flowering stage in rice. Chinese Journal of Rice Science 21, 99–102.
Zheng, J. C., Zhang, B. & Chen, L. G. (2005). Genotypic differences in effects of high air temperature in field on rice yield components and grain quality during heading stage. Jiangsu Journal of Agricultural Science 21, 249254.
Zheng, Z. G. (2003). The influence of temperature and light on grain-filling, dry matter production of rice. Journal of Beijing Agricultural College 18, 1316.

The impact of relative humidity, genotypes and fertilizer application rates on panicle, leaf temperature, fertility and seed setting of rice

  • C. YAN (a1), Y. DING (a1), Q. WANG (a1), Z. LIU (a1), G. LI (a1), I. MUHAMMAD (a1) and S. WANG (a1)...


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