Evaluation of cultivation environment and management based on LAI measurement in farmers’ paddy fields in Pursat province, Cambodia
Evaluation of cultivation environment and management based on LAI measurement in farmers’ paddy fields in Pursat province, Cambodia
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基于LAI测量的柬埔寨菩萨省农户稻田耕作环境与管理评价
DOI：
10.1016/j.fcr.2016.08.031
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发表时间：
2016
影响因子：
5.8
通讯作者：
Toshio Koike
中科院分区：
文献类型：
--
作者：
Yoshihiro Hirooka;Koki Hommaa;Taisuke Kodo;Tatsuhiko Shiraiwa;Kim Soben;Mithona Chann;Kumiko Tsujimoto;Katsunori Tamagawa;Toshio Koike
水稻是柬埔寨最重要的农作物。大力建议提高其生产力，但有关农民稻田的栽培环境、管理及其对水稻生产的影响的信息相当有限。本研究于2014年在柬埔寨菩萨省巴肯区的77个农民稻田中使用植物冠层分析仪定期测量叶面积指数（LAI）并进行产量、水、土壤和管理调查。由于在几乎所有的农田中叶面积指数都呈线性增长，因此叶面积指数的增长率是由线性回归确定的。籽粒产量范围为70.8 g m-2 ~ 499.0 g m-2，与最大叶面积指数呈正相关。最大叶面积指数的变化主要是由叶面积指数的增长率来解释的，而生育期与最大叶面积指数只有在抛秧田中才有显著的相关性，在抛秧田中，较早的种植会导致较大的叶面积指数。协方差分析结果表明，播期、水分状况和土壤条件（C含量和C/N比）对叶面积指数（LAI）的增长率有显著影响，而种植方式（移栽/撒播）和氮肥的影响不显著。氮肥效应的不显著性可能暗示着施肥时机或方法的不当。结果表明，根据土壤肥力状况，合理施肥，选择适宜的种植方式和节水灌溉是提高水稻生产力的关键。
Rice is by far the most important crop in Cambodia. The improvement of its productivity is strongly recommended, but information about cultivation environment, management and their effects on rice production in farmers’ paddy fields is quite limited. This study periodically measured the leaf area index (LAI) by using a plant canopy analyzer and conducted yield, water, soil and management investigations in 77 farmers’ paddy fields in the Bakan district, Pursat province, Cambodia in 2014. Because the LAI showed linear growth in almost all farmers’ fields, the LAI growth rate was determined by linear regression. The grain yield ranged from 70.8 g m−2to 499.0 g m−2and was positively correlated with the maximum LAI. The variability in the maximum LAI was mainly explained by the LAI growth rate, while the growth period had a significant correlation with the maximum LAI only in the broadcast fields, where earlier planting led to larger LAI. The result of the ANCOVA shows that the LAI growth rate was affected by seeding date, water status and soil condition (C content and C/N ratio) while the effect of planting method (transplanting/broadcasting) and N fertilizer was non-significant. The non-significance of effect of N fertilizer may imply the timing or method of application is improper. The results suggest that the key means to improve rice productivity are effective application of fertilizer and selection of planting methods dependent on the soil fertility, together with water-saving irrigation method.
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影响因子：
0.4
作者：
Mizuki Matsukawa;Kasumi Ito;K. Kawakita;Toshiharu Tanaka
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Toshiharu Tanaka
影响因子：
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作者：
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DOI：
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发表时间：
2013
期刊：
--
影响因子：
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作者：
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DOI：
--
发表时间：
2009
期刊：
Tropic. Agric. Develop.
影响因子：
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作者：
Kamoshita;A.;Chea;S.;Hayashi;S.;Ikeda;H.;Jongdee;B.
通讯作者：
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DOI：
--
发表时间：
1946
期刊：
The Yale Journal of Biology and Medicine
影响因子：
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作者：
H. B. Vickery
通讯作者：
H. B. Vickery