Estimation of Evapotranspiration and Crop Coefficient of Rain-Fed Tea Plants under a Subtropical Climate

Crop coefficient (K<sub>c</sub>) is one of the most significant parameters for crop water demand prediction and irrigation scheduling. However, there is a lack of knowledge about water vapor and K<sub>c</sub> in tea plantation ecosystems. This study explored and determined th...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Shenghong Zheng, Kang Ni, Lingfei Ji, Chenguang Zhao, Hongling Chai, Xiaoyun Yi, Weizhong He, Jianyun Ruan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	water vapor crop coefficient tea plantation subtropical region lysimeter method Agriculture S
Acceso en línea:	https://doaj.org/article/00919626aab44a10bcdae305e6ff5fbc
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:00919626aab44a10bcdae305e6ff5fbc
record_format	dspace
spelling	oai:doaj.org-article:00919626aab44a10bcdae305e6ff5fbc2021-11-25T16:11:50ZEstimation of Evapotranspiration and Crop Coefficient of Rain-Fed Tea Plants under a Subtropical Climate10.3390/agronomy111123322073-4395https://doaj.org/article/00919626aab44a10bcdae305e6ff5fbc2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4395/11/11/2332https://doaj.org/toc/2073-4395Crop coefficient (K<sub>c</sub>) is one of the most significant parameters for crop water demand prediction and irrigation scheduling. However, there is a lack of knowledge about water vapor and K<sub>c</sub> in tea plantation ecosystems. This study explored and determined the actual evapotranspiration (ET<sub>c</sub>) and K<sub>c</sub> of two cultivars of tea (<i>Camellia sinensis</i>), clone variety Baiye1 (BY1) and Longjing43 (LJ43), based on lysimeter data. An estimation was made for both for ET<sub>c</sub> and adjusted ET<sub>c</sub>, and the corresponding K<sub>c</sub> and adjusted K<sub>c</sub>. The results showed that the adjusted ET<sub>c</sub> and K<sub>c</sub> values revealed a minor fluctuation when compared to the ET<sub>c</sub> and K<sub>c</sub> values during the experimental period, which indicated that the adjusted ET<sub>c</sub> and K<sub>c</sub> values were more precise and practical to field conditions. The average adjusted K<sub>c</sub> values were 0.71 (range of 0.43–1.02) for BY1 and 0.84 (range of 0.48–1.22) for LJ43. Additionally, heavy pruning can decrease ET<sub>c</sub> and K<sub>c</sub> values, possibly due to the lower level of LAI after pruning. Moreover, it is clearly manifested that BY1 consistently had lower ET<sub>c</sub> and K<sub>c</sub> values than those of LJ43 because of plant growth status differences between BY1 and LJ43. Overall, our study proposed a reliable reference of K<sub>c</sub> in tea plantation, and illuminated the effects of pruning and plant growth differences on K<sub>c</sub>, which could provide a strong basis for precise irrigation in tea plantations in a subtropical climate.Shenghong ZhengKang NiLingfei JiChenguang ZhaoHongling ChaiXiaoyun YiWeizhong HeJianyun RuanMDPI AGarticlewater vaporcrop coefficienttea plantationsubtropical regionlysimeter methodAgricultureSENAgronomy, Vol 11, Iss 2332, p 2332 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	water vapor crop coefficient tea plantation subtropical region lysimeter method Agriculture S
spellingShingle	water vapor crop coefficient tea plantation subtropical region lysimeter method Agriculture S Shenghong Zheng Kang Ni Lingfei Ji Chenguang Zhao Hongling Chai Xiaoyun Yi Weizhong He Jianyun Ruan Estimation of Evapotranspiration and Crop Coefficient of Rain-Fed Tea Plants under a Subtropical Climate
description	Crop coefficient (K<sub>c</sub>) is one of the most significant parameters for crop water demand prediction and irrigation scheduling. However, there is a lack of knowledge about water vapor and K<sub>c</sub> in tea plantation ecosystems. This study explored and determined the actual evapotranspiration (ET<sub>c</sub>) and K<sub>c</sub> of two cultivars of tea (<i>Camellia sinensis</i>), clone variety Baiye1 (BY1) and Longjing43 (LJ43), based on lysimeter data. An estimation was made for both for ET<sub>c</sub> and adjusted ET<sub>c</sub>, and the corresponding K<sub>c</sub> and adjusted K<sub>c</sub>. The results showed that the adjusted ET<sub>c</sub> and K<sub>c</sub> values revealed a minor fluctuation when compared to the ET<sub>c</sub> and K<sub>c</sub> values during the experimental period, which indicated that the adjusted ET<sub>c</sub> and K<sub>c</sub> values were more precise and practical to field conditions. The average adjusted K<sub>c</sub> values were 0.71 (range of 0.43–1.02) for BY1 and 0.84 (range of 0.48–1.22) for LJ43. Additionally, heavy pruning can decrease ET<sub>c</sub> and K<sub>c</sub> values, possibly due to the lower level of LAI after pruning. Moreover, it is clearly manifested that BY1 consistently had lower ET<sub>c</sub> and K<sub>c</sub> values than those of LJ43 because of plant growth status differences between BY1 and LJ43. Overall, our study proposed a reliable reference of K<sub>c</sub> in tea plantation, and illuminated the effects of pruning and plant growth differences on K<sub>c</sub>, which could provide a strong basis for precise irrigation in tea plantations in a subtropical climate.
format	article
author	Shenghong Zheng Kang Ni Lingfei Ji Chenguang Zhao Hongling Chai Xiaoyun Yi Weizhong He Jianyun Ruan
author_facet	Shenghong Zheng Kang Ni Lingfei Ji Chenguang Zhao Hongling Chai Xiaoyun Yi Weizhong He Jianyun Ruan
author_sort	Shenghong Zheng
title	Estimation of Evapotranspiration and Crop Coefficient of Rain-Fed Tea Plants under a Subtropical Climate
title_short	Estimation of Evapotranspiration and Crop Coefficient of Rain-Fed Tea Plants under a Subtropical Climate
title_full	Estimation of Evapotranspiration and Crop Coefficient of Rain-Fed Tea Plants under a Subtropical Climate
title_fullStr	Estimation of Evapotranspiration and Crop Coefficient of Rain-Fed Tea Plants under a Subtropical Climate
title_full_unstemmed	Estimation of Evapotranspiration and Crop Coefficient of Rain-Fed Tea Plants under a Subtropical Climate
title_sort	estimation of evapotranspiration and crop coefficient of rain-fed tea plants under a subtropical climate
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/00919626aab44a10bcdae305e6ff5fbc
work_keys_str_mv	AT shenghongzheng estimationofevapotranspirationandcropcoefficientofrainfedteaplantsunderasubtropicalclimate AT kangni estimationofevapotranspirationandcropcoefficientofrainfedteaplantsunderasubtropicalclimate AT lingfeiji estimationofevapotranspirationandcropcoefficientofrainfedteaplantsunderasubtropicalclimate AT chenguangzhao estimationofevapotranspirationandcropcoefficientofrainfedteaplantsunderasubtropicalclimate AT honglingchai estimationofevapotranspirationandcropcoefficientofrainfedteaplantsunderasubtropicalclimate AT xiaoyunyi estimationofevapotranspirationandcropcoefficientofrainfedteaplantsunderasubtropicalclimate AT weizhonghe estimationofevapotranspirationandcropcoefficientofrainfedteaplantsunderasubtropicalclimate AT jianyunruan estimationofevapotranspirationandcropcoefficientofrainfedteaplantsunderasubtropicalclimate
_version_	1718413297602002944

Estimation of Evapotranspiration and Crop Coefficient of Rain-Fed Tea Plants under a Subtropical Climate

Ejemplares similares