Effects of different drip irrigation patterns on water distribution in potted Yunnan red loam and yellow-sand soil and pepper growth

Abstract

It is important to study the law of water distribution in potted soil and the appropriate irrigation methods for improving the level of water-saving irrigation in greenhouse cultivation. In this study, pepper was taken as the experimental crop. Two kinds of drip irrigation models (root zone infiltrating irrigation and surface drip irrigation) and two kinds of irrigation emitter arrangements (a 3 × 120° distribution and a 2 × 180° distribution) were used to plot out the distribution pattern of soil water in a potted planting environment for two kinds of soils (Yunnan red loam and yellow-sand soil). Then, the growth indices of peppers were compared. The results showed that drip irrigation models and soil types had a significant interactive effect on soil water distribution (P < 0.01); in Yunnan red loam, the matric potential played a major role in the transport of irrigation water, while in yellow-sand soil, gravitational potential played a major role. Under root zone infiltrating irrigation, the high-water-content distribution area of the two types of soil is more continuous and balanced than that of surface drip irrigation, and the balance of water distribution of the yellow-sand soil is better than that of the red loam. In Yunnan red loam, the growth indices of peppers (plant height, stem diameter, fruit fresh weight, fruit dry weight, and similarly hereinafter) increased by 12.9%, 14.3%, 46.1%, and 36.8%, respectively; in yellow-sand soil, the growth indices under root zone infiltrating irrigation were 31.7%, 25.9%, 26.9%, and 35.3%, which were lower than those of surface drip irrigation. The experiment shows that in a greenhouse potting environment, Yunnan red loam with root zone infiltrating irrigation offers more water-saving potential. The results provide a theoretical basis and data support for the rational selection of drip irrigation models for facility agriculture in Yunnan.

Soil-Matric-Potential-Based Irrigation Scheduling to Increase Yield and Water Productivity of Okra

“…Uniform distribution of soil moisture between soil depths of 15 to 37 cm in sandy loam soil at 30 cm dripper spacing was assessed with parallel contour lines plotted in Surfer 7.0 software with better uniformity of water spread [40]. The soil matric potential is decided by transporting irrigation water within the soil under a drip irrigation system [41]. The salt distribution in peas under a drip irrigation system was found to increase the soil salinity at the vertical distance from the dripper point and around the periphery of the wetted zone [42].…”

Determinação Do Crescimento E Desenvolvimento Do Caule De Feijão Comum Fertirrigado Com Vinhaça

“…A pimenta Capsicum baccatum dedo-de-moça amarela é uma solanácea perene, arbustiva, cujos frutos encontrados podem estar em diferentes estádios de maturação (MACHADO et al, 2021;PEREIRA et al, 2014;ZHANG et al, 2018).…”

Water Content Variations and Pepper Water-Use Efficiency of Yunnan Laterite Under Root-Zone Micro-Irrigation

“…For the continuity of the study, based on the methods and findings of previous studies ( Yu et al, 2018 , Yu et al, 2015 ; Zhang et al, 2018 , 2019a , b ), this study first quantitatively examined the water content of a Yunnan SR at a small scale (flowerpot) under IG and in the absence of crop cultivation, and then the potential of IG for improving the WUE of a specific crop (Sichuan hot pepper) cultivated on the SR. Our results provide theoretical and experimental data support for the high-efficiency application of root-zone micro-irrigation in greenhouse agriculture in Yunnan, China.…”