Ending composting during the thermophilic phase improves cultivation substrate properties and increasing winter cucumber yield

Gao, Yinan; Yu, Hongjun; Liu, Peng; Ma, Chao; Li, Qiang; Jiang, Weijie

doi:10.1016/j.wasman.2018.07.048

Cited by 14 publications

(10 citation statements)

References 37 publications

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“…There were differences in acid pHBC between sand and the other substrates. HA is an acidic substance, and pH is one of the most representative indicators of substrate chemical properties ( Gao et al, 2018 ). When HA was added to sand, pH decreased dramatically, owing to the poor acidic pHBC, and improper rhizospheric pH led to physiological disorder of roots, thereby severely affecting plant uptake of water and nutrients, which consequently resulted in low plant biomass ( Wang et al, 2016 ).…”

Section: Discussionmentioning

confidence: 99%

“…Substrate samples were analyzed for TOC using the dry combustion method. OM was calculated as OM (g/kg) = TOC (g/kg) × 1.724 ( Gao et al, 2018 ). CEC of the substrates was measured using the ammonium acetate compulsory displacement method ( Xu et al, 2012 ).…”

Section: Methodsmentioning

confidence: 99%

“…Soilless substrates have proper pH value, lighter bulk density and no soil-borne disease, which can replace soil to provide a good growth environment for plants ( Vaughn et al, 2011 ; Banitalebi et al, 2021 ). Nowadays, more and more farmers are inclined to use soilless substrates for vegetable cultivation in protected fields ( Gao et al, 2018 ). Limited studies have been carried out on the effects of HA application on soilless substrates with significantly different bulk density, porosity, OM, pH buffering capacity (pHBC), and nutrient storage capacity.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Humic Acid Addition on Buffering Capacity and Nutrient Storage Capacity of Soilless Substrates

Mohamed

et al. 2021

Front. Plant Sci.

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Excessive application of fertilizers has become a major issue in croplands of intensive agricultural systems in China, resulting in severe non-point source pollution; thus, reduction in the use of chemical fertilizers has received significant attention. Improving the nutrient storage capacity of soils or substrates is an effective approach for solving this problem. Humic acids (HA) are excellent soil conditioners. Thus, in the present study, their ability to improve the physico-chemical properties of three substrates with different textures was evaluated. HA treatments included 1% HA root application in three different types of substrates, including pure sand, pure cocopeat, and a mixture of sand:cocopeat (1:1, v/v) and their relative controls. We examined the morphological parameters of cucumber seedlings as well as pH buffering capacity (pHBC), total organic carbon (TOC), organic matter (OM), cation exchange capacity (CEC), and nutrient storage capacity of the three substrates. The results show that HA application improved the morphological parameters of cucumber seedlings (plant height, stem diameter, and biomass) in pure cocopeat and cocopeat-sand mixture treatments. On the contrary, HA addition had harmful effects on the cucumber seedlings cultivated in sand due to the low pHBC of sand. The seedlings cultivated in pure cocopeat showed the best morphological parameter performances among the seedlings grown in the three substrates. Furthermore, pHBC, TOC, OM, and CEC were enhanced by HA application. Incorporation of HA improved ammonium (NH4+) and potassium (K+) storage capacity while decreasing phosphorus (P) storage. Pure cocopeat had the highest pHBC, TOC, OM, CEC, and nutrient storage capacity among the three substrates. In conclusion, mixing 1% HA into substrates promoted cucumber growth, improved substrate properties, and enhanced fertilizer use efficiency. Pure cocopeat is a suitable substrate for cucumber cultivation, and mixing cocopeat with sand amends the substrate properties and consequently improves plant growth.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Humic Acid Addition on Buffering Capacity and Nutrient Storage Capacity of Soilless Substrates

Mohamed

et al. 2021

Front. Plant Sci.

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“…The TC and TN contents of vegetable residues were determined using an element analyser (Vario Macro, Elementar Analysensysteme GmbH, Germany). The TP and TK contents of vegetable residues were determined by ICP-AES (ICP6300, Thermo Fisher Scientific, USA) according to Gao et al (2018) [23].…”

Section: Fruit Yield and Physicochemical Characteristics Of Vegetable Residuesmentioning

confidence: 99%

Techno-Economic Feasibility of In Situ Vegetable Residue Return in the Chinese Solar Greenhouse

Wei

Fan

et al. 2021

Agronomy

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The tremendous scale of protected vegetable cultivation incidentally produces considerable vegetable residue, which refers to the remaining parts of plants after the final harvest. The low use rate of vegetable residue results in nutrient waste and environmental pressure in China. In this study, we put forward vegetable residue directly returned to the soil and investigated its feasibility. Residue return was steadily conducted 5 times in a Chinese solar greenhouse with the cucumber–tomato rotation pattern. Results showed that residue return increased the soil alkali-hydrolysed nitrogen and available potassium contents by 4.97–26.22% and 9.31–21.92%, respectively, along with slightly reduced soil pH and bulk density by 1.00–5.39% and 6.72–11.81%, respectively. Gemmatimonadetes, Firmicutes, Acidobacteria, Basidiomycota, and Mortierellomycota were the major phyla with noticeable changes when residue return was conducted 5 times. Fruit yield began to obtain remarkable increase by 5.81–9.26 t·ha−1 after residue return was conducted 3 times, bringing about additional profits of 5382.0–8519.2 USD·ha−1. Residue return could cut down the disposal expense of vegetable residues by 480.89 USD·ha−1. Moreover, residue return could supplement nutrients to soil, potentially contributing to reducing chemical fertilizer inputs. In conclusion, in situ vegetable residue return could be considered to be a feasible and sustainable use technique for vegetable residues in the Chinese solar greenhouse.

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“…Total chlorophyll content was estimated by using a portable The Soil Plant Analysis Development (SPAD) chlorophyll apparatus (SPAD-502 Plus, Konica Minolta, Tokyo, Japan). The leaf net photosynthesis rate for 3 independent lettuce seedlings per experimental replicate was determined using a portable LI-6400 photosynthesis system (Li-Cor 6400-18, Lincoln, NE, USA) [40,50]. The set values used were as follows: photosynthetic photon flux density, 500 µmol•m −2 •s −1 ; air flow rate inside the sample chamber, 400 µmol•s −1 .…”

Section: Physiological Measurementsmentioning

confidence: 99%

Exogenous Application of Amino Acids Improves the Growth and Yield of Lettuce by Enhancing Photosynthetic Assimilation and Nutrient Availability

Khan

et al. 2019

Agronomy

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129

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As natural plant growth stimulators, amino acids are widely used to improve the yield and quality of crops. Several studies have illustrated the effects of different amino acids on lettuce plant parts. However, the effects of applying single amino acids on root growth remain elusive. The objective of this study was to evaluate the effect of root application of L-methionine on the growth of lettuce. In this study, two successive experiments on butterhead lettuce were conducted under hydroponic conditions. Three amino acids, L-methionine (20 mg/L), L-glycine (210 mg/L), and L-tryptophan (220 mg/L), were applied separately. L-methionine significantly increased the growth performance by 23.60%, whereas growth using L-tryptophan and L-glycine decreased by 98.78% and 27.45%, respectively. Considering the results of the first experiment, a second experiment was established with different concentrations of L-methionine (2200 mg/L, 220 mg/L, 22 mg/L, 2.2 mg/L, 0.2 mg/L, and 0.02 mg/L). The plants were allowed to grow for four weeks. Leaf width, plant area, leaf area, chlorophyll contents, etc., were evaluated. The results show that plant growth significantly improved by applying L-methionine at the lowest concentrations of 0.2 mg/L and 0.02 mg/L, which can, therefore, improve hydroponic production of lettuce and, accordingly, human nutrition.

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Ending composting during the thermophilic phase improves cultivation substrate properties and increasing winter cucumber yield

Cited by 14 publications

References 37 publications

Effect of Humic Acid Addition on Buffering Capacity and Nutrient Storage Capacity of Soilless Substrates

Effect of Humic Acid Addition on Buffering Capacity and Nutrient Storage Capacity of Soilless Substrates

Techno-Economic Feasibility of In Situ Vegetable Residue Return in the Chinese Solar Greenhouse

Exogenous Application of Amino Acids Improves the Growth and Yield of Lettuce by Enhancing Photosynthetic Assimilation and Nutrient Availability

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