Effect of Moistube Fertigation on Infiltration and Distribution of Water-Fertilizer in Mixing Waste Biomass Soil

Guangzhao Sun, Yilin Li, Xiaogang Liu, Ningbo Cui, Yanli Gao and Qiliang Yang
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Guangzhao Sun: Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming 650500, China
Yilin Li: Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming 650500, China
Xiaogang Liu: Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming 650500, China
Ningbo Cui: State Key Laboratory of Hydraulics and Mountain River Engineering and College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China
Yanli Gao: Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming 650500, China
Qiliang Yang: Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming 650500, China

Sustainability, 2019, vol. 11, issue 23, 1-16

Abstract: A series of indoor soil box simulation experiments were carried out to investigate the infiltration capacity of fertilizer solution in mixing waste biomass and the distribution characteristics of water-fertilizer in wetted soil under moistube fertigation. The infiltration rate and cumulative infiltration of moistube fertigation in soils as well as the distribution characteristics of water-fertilizer (soil water, nitrate–N, available P, and available K) in wetted soil were studied in three waste biomass (peanut shell) mixing ratios (MR1.5%, MR3.0%, and MR4.5%) taking a not amended soil as control (CK). The cumulative infiltration of fertilizer solution and the distribution of water-fertilizer were fitted by a modified infiltration model. Results indicated that increasing the mixing ratio improved significantly the infiltration rate and cumulative infiltration of fertilizer solution and the distribution area and content of water-fertilizer in amended wetting soil compared with CK. The relationship between the cumulative infiltration of fertilizer solution and infiltration time conformed to the Kostiakov infiltration model. The distribution uniformity coefficient of soil water and nitrate–N increased with the increase in waste biomass mixing ratio, whereas available P and available K decreased in wetted soil. The 4-parameter log-logistic model fitted well with the distribution of water-fertilizer in mixing waste biomass wetted soil under moistube fertigation. The research results could provide a theoretical basis and practical reference for the popularization and application of new moistube fertigation technology.

Keywords: irrigation and fertilization; waste biomass; infiltration characteristics; nutrient distribution (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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