干旱区生态环境知识资源中心(Arid): Pod quality, yields responses and water productivity of okra (Abelmoschus esculentus L.) as affected by plant growth regulators and deficit irrigation

Arid

DOI	10.1016/j.agwat.2023.108267
	Pod quality, yields responses and water productivity of okra (Abelmoschus esculentus L.) as affected by plant growth regulators and deficit irrigation
	Wakchaure, G. C.; Minhas, P. S.; Kumar, Satish; Khapte, P. S.; Dalvi, S. G.; Rane, J.; Reddy, K. Sammi
通讯作者	Wakchaure, GC
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2023
卷号	282
英文摘要	Water scarcity severely impacts agricultural productivity and quality in arid and semi-arid regions. Specific elicitors like plant growth regulators (PGRs) and bio-stimulants as well as deficit irrigation (DI) practices have been put forward to alleviate the effect of resultant water stress and enhance crop productivity. Hence, a field experiment was conducted for two years (2020-2022) to elucidate the effects of PGRs and bio-stimulants of organic and chemical origins under variable deficit irrigation levels on okra (Abelmoschus esculentus L.), a major crop grown in the semi-arid region of peninsular India. Treatments included combinations of the foliar sprays with PGRs i.e. irradiated chitosan (IC, 5 ml L-1), sea weed extracts (SWE, 5 ml L-1), thio-urea (TU, 600 ppm), salicylic acid (SA, 20 mu M), bacterial biopolymer (BP, 5 ml L-1) along with control (no PGR) and DI levels i.e. equalling 100 %, 75 %, 50 % and 25 % of the crop evapotranspiration (ETc). Irrigation levels were maintained using line source sprinkler (LSS) system. Reductions in pod yield (PY) and above ground biomass (AGB) ranged between 12 and 83 and 20-79 % with DI of 0.75-0.25 ETc. Exogenous foliar application of PGRs improved plant growth, physiological traits and thereby increased PY by 6.1-19.2 %. Beneficial role of PGRs for mitigating water stress was associated with cooler canopy temperatures, maintenance of higher leaf relative water content by modulating stomatal conductance, enhanced plant vigour and photosynthetically active surface. The lower values of yield response factors viz., KSWE <= 1 with SWE further indicated increased tolerance of okra to water stress. The maximum crop water productivity (CWP) was 3.43-3.79 kg m-3 with PGRs as compared with 3.32 kg m-3 without PGR. Especially PGRs of organic origin (SWE and IC) were more effective under medium to severe water stress conditions. The response to BP, bio-stimulant of bacterial origin was almost at par with SA. DI reduced physical quality attributes such as mean pod weight and pod length but firmness and seed/peel ratio got improved; the maximum being with 75 % ETc. Improved rehydration quality and higher accumulation of total soluble solids, dry matter, protein, total phenolics, and flavonoids that potentially affect enzymatic activity were monitored with PGRs. It is concluded that the exogenous foliar application of PGRs from organic origins such as SWE and IC in combination with low to moderate DI (50-75 % ETc) is optimal for improving production and post-harvest quality of okra grown in water-scarce areas of peninsular India.
英文关键词	B E Clothier Crop water productivity (CWP) Deccan plateau Line source sprinkler system (LSS) Pod biochemical quality Water stress Yield response factors
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000955644300001
WOS关键词	SOLANUM-MELONGENA L. ; BIO-REGULATORS ; STRESS ; WHEAT ; DRIP ; TEMPERATURE ; EGGPLANT ; DROUGHT ; SEED
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395060
推荐引用方式 GB/T 7714	Wakchaure, G. C.,Minhas, P. S.,Kumar, Satish,et al. Pod quality, yields responses and water productivity of okra (Abelmoschus esculentus L.) as affected by plant growth regulators and deficit irrigation[J],2023,282.
APA	Wakchaure, G. C..,Minhas, P. S..,Kumar, Satish.,Khapte, P. S..,Dalvi, S. G..,...&Reddy, K. Sammi.(2023).Pod quality, yields responses and water productivity of okra (Abelmoschus esculentus L.) as affected by plant growth regulators and deficit irrigation.AGRICULTURAL WATER MANAGEMENT,282.
MLA	Wakchaure, G. C.,et al."Pod quality, yields responses and water productivity of okra (Abelmoschus esculentus L.) as affected by plant growth regulators and deficit irrigation".AGRICULTURAL WATER MANAGEMENT 282(2023).