Importance of PAR interception and radiation use efficiency on growth and yield of Potatoes under different microclimates in the upper Brahmaputra valley zone of Assam
IF 0.7 4区 地球科学Q4 METEOROLOGY & ATMOSPHERIC SCIENCES
Raktim Jyoti Saikia, P. Neog, R. L. Deka, K. Medhi
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引用次数: 0
Abstract
A field experiment was conducted at Assam Agricultural University, Jorhat, Assam during rabi 2018-19 for assessing the PAR interception and radiation use efficiency in potato variety Kufri Jyoti under different microclimates, which was planted in split plot design with 4 dates of plantings and three mulching treatments with water hyacinth, black polythene and without mulching. The incident, reflected and transmitted PAR were measured periodically over the crop with line quantum sensor and daily incident radiation were calculated from incident PAR and bright sunshine hours. The interception of PAR (iPAR) varied considerably among different treatments, while highest iPAR was recorded under first date of planting and mulching treatment with water hyacinth. The leaf area index (LAI) and biomass production was highest in crop planted in first date planting and grown under water hyacinth mulch. The RUE for tuber yield was highest under water hyacinth (2.35 g MJ-1) followed by black polythene (2.03 g MJ-1) and non-mulched (1.67 g MJ-1) condition, while among planting dates it was highest in case of first date of planting. The LAI, biomass production and yield of potato were found to be significantly correlated with iPAR and RUE. The predictive models were developed by using stepwise regression method to predict tuber yield from iPAR and REU, which have R2 value of 0.96 and 0.99, respectively.
阿萨姆邦布拉马普特拉河流域上游地区不同小气候条件下 PAR 截获量和辐射利用效率对马铃薯生长和产量的影响
阿萨姆邦乔哈特的阿萨姆农业大学于2018-19年秋季进行了一项田间试验,以评估马铃薯品种Kufri Jyoti在不同小气候条件下的PAR截获和辐射利用效率,该试验采用分小区设计,有4个种植日期,并有水葫芦、黑色聚乙烯和无覆盖物三种覆盖物处理。用线量子传感器定期测量作物的入射、反射和透射 PAR,并根据入射 PAR 和日照时数计算日入射辐射。不同处理的截获 PAR(iPAR)差异很大,而在第一种植日和布袋莲覆盖处理下的 iPAR 最高。叶面积指数(LAI)和生物量产量在首播日种植和布袋莲覆盖下的作物中最高。在布袋莲(2.35 克 MJ-1)条件下,块茎产量的 RUE 值最高,其次是黑色聚乙烯(2.03 克 MJ-1)和无覆盖物(1.67 克 MJ-1)条件下,而在不同的种植日期中,第一种植日期的 RUE 值最高。发现马铃薯的 LAI、生物量产量和产量与 iPAR 和 RUE 显著相关。利用逐步回归法建立了预测模型,通过 iPAR 和 REU 预测块茎产量,其 R2 值分别为 0.96 和 0.99。
期刊介绍:
MAUSAM (Formerly Indian Journal of Meteorology, Hydrology & Geophysics), established in January 1950, is the quarterly research
journal brought out by the India Meteorological Department (IMD). MAUSAM is a medium for publication of original scientific
research work. MAUSAM is a premier scientific research journal published in this part of the world in the fields of Meteorology,
Hydrology & Geophysics. The four issues appear in January, April, July & October.