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Impact of Meteorological Factors on Rice Growth Stages and Yield

文献类型： 外文期刊

作者： Kulyakwave, Peter David 1 ; Xu, Shiwei 1 ; Wen, Yu 1 ;

作者机构： 1.Chinese Acad Agr Sci, Agr Informat Inst, Beijing 100081, Peoples R China

2.Dept Res Training & Market Dev, Box 1694, Dar Es Salaam, Tanzania

关键词： Meteorological factors; natural and non-natural factors; rice; weather; yield

期刊名称：PERTANIKA JOURNAL OF SCIENCE AND TECHNOLOGY （ 影响因子：0.6； 五年影响因子：0.6 ）

ISSN： 0128-7680

年卷期： 2020 年 28 卷 3 期

页码：

收录情况： SCI

摘要： Weather variability poses threats to rural crop producers in Tanzania. This research aimed to find the impact of weather variation on the growth stage and yield of rice in Tanzania. The analyses were done using rice yield data and weather variables from 1981-2017. The approaches used were; decomposing rice yields into yield tendency and yield weather, stepwise integral regression for identification of significant yield model, and applied Fisher's meteorological regression and Chebyshev polynomial function to compute coefficients for weather factors. From the results, other than the non-natural factors, rainfall, maximum and minimum temperature, and sunshine significantly affect rice yield from sowing to harvest stage. The effect of rainfall, sunshine, maximum and minimum temperature coefficients on the rice yield differ by growth stage. An increase of 1 millimeter of rainfall at the sowing-seedling stage increased rice yield by 2.7 kg/ha. In the sowing-seedling stage, the temperature had a stronger positive influence on the rice yield as with every 1 degrees C in average maximum temperature increased the rice yield by 674.1 kg/ha. The minimum temperature coefficient had stronger influences in the vegetative, tillering-booting stages, thus, with 1 degrees C increase in average minimum temperature, the rice yield increased by 70.1 kg/ha and 420.7 kg/ha respectively. In the flowering-grain formation stage, the maximum temperature had a greater influence on rice yield, that is, as 1 degrees C increased, the rice yielded increased by 674.7 kg/ha. The sunshine duration had a higher influence on the harvesting stage. Increased 1-hour duration of sunshine increased rice yield by 495.95 kg /ha. Finally, a meteorological rice model, which could be used for rice yield forecasting in the region, was developed.

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