Water-stable aggregates and carbon accumulation in barren sandy soil depend on organic amendment method: A three-year field study

Dai, Hongcui; Chen, Yuanquan; Liu, Kaichang; Li, Zongxin; Qian, Xiaoqing; Zang, Huadong; Yang, Xiaolei; Zhao, Yingxing; Shen, Yongming; Li, Zhejin; Sui, Peng

doi:10.1016/j.jclepro.2018.12.013

Cited by 76 publications

(45 citation statements)

References 60 publications

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“…The current results are similar to those reported by Nair and Ngouajio (2010) The increase in those parameters may have resulted from the increases in organic matter content in soil upon application of the organic amendments (Luan et al, 2019) and this would in turn, improve soil fertility (Dai et al, 2019;Mondal et al, 2019). The highest increases in curd height, diameter and fresh weight were recorded for plants amended with 14.4 m 3 ha -1 and irrigated with 85% of FI.…”

Section: Growth Parameters Of Cauliflower As Affected By Irrigation Asupporting

confidence: 88%

Implications of Water Stress and Organic Fertilization on Growth, Yield and Water Productivity of Cauliflower (Brassica oleracea Var. Botrytis, L.)

Shams

Farag

2019

Journal of Plant Production

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Shortage of available water resources has become a critical problem facing vegetable production in Egypt. So, the aim of this study is to decrease the level of irrigation water: 85 and 70% of full irrigation requirements (FI), versus 100% FI in presence of four compost rates (0, 4.8, 9.6 and 14.4 m 3 ha -1 ). Results show that, deficit irrigation levels caused considerable reductions in many growth parameters and the total yield. But we can save 15% of the water used with an average total yield of 39.15 Mgha -1 and a yield shortage of 14.1% in both seasons. This is an acceptable level of decrease in view of the 36.3 Mgha -1 national average according to the 2017 Egypt's Agricultural Statistics. The application of compost at different rates increases the growth, quality and quantity of cauliflower at different water deficiency levels. The highest application rate of compost + 100% of FI recorded the highest values in the characteristics of vegetative growth, total yield and NPK content in curd. The treatment 85% of FI + 14.4 m 3 compost / ha came in the second rank recording significant differences with all other treatments in both seasons. The results also indicate that the water productivity in the case of 85% FI is significantly equal to the water productivity in case of 100% of FI in both seasons. It is; therefore, concluded that compost applications minimized the negative implications of deficient irrigation on cauliflower production.

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Section: Growth Parameters Of Cauliflower As Affected By Irrigation Asupporting

confidence: 88%

Implications of Water Stress and Organic Fertilization on Growth, Yield and Water Productivity of Cauliflower (Brassica oleracea Var. Botrytis, L.)

Shams

Farag

2019

Journal of Plant Production

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“…However, the effect of straw biochar on soil aggregates is controversial. Liu [18] found that when the amount of biochar applied was 40 t•ha -1 , the MWD of soil water-stable aggregates increased by 28.02%; Dai [19] found that MWD decreased by 18.9%-43.2% during the three years of biochar application to the soil; while Hou [20] found that single application of biochar had no significant effect on soil GMD and MWD, which was consistent with the results of this study. The reason may be that the organic carbon in biochar is mainly inert carbon , which is low in the utilization rate of microbial decomposition, and does not produce sticky substances in the decomposition process to promote the formation of agglomerates [21,22].…”

Section: Discussionsupporting

confidence: 88%

Comparison of the effects of different maize straw returning methods on saline soil improvement

Cai

Yuan

2019

E3S Web Conf.

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Using corn straw as raw material, the effects of three different ways of returning corn straw to the field, namely direct returning corn straw to the field, decomposed corn straw returning to the field and maize straw biochar returning to the field, on saline-alkali soil were studied by indoor culture. The results showed that maize straw directly returned to the field was the best way to improve the stability of saline-alkali soil aggregates; maize straw biochar returned to the field was the best way to reduce the alkalinity of saline-alkali soil; maize straw directly returned to the field and decomposed maize straw returned to the field enhanced the activity of soil urease and alkaline phosphatase, while reducing the activity of soil catalase. Maize straw biochar returned to field reduced soil urease activity and increased soil catalase activity, but had no significant effect on soil alkaline phosphatase activity.

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“…Zhang et al () found that the changed soil macroaggregates caused by conservation tillage could shift microbial communities to more anaerobic and fungal biomasses due to the influence of moisture conditions and aeration levels. Our previous results have confirmed that the distribution and organic carbon content of water‐stable aggregates was dramatically affected by the organic amendment at this site (Dai et al, ). On the basis of these findings, we hypothesized that the effects of organic amendments on the bacterial communities vary with aggregate size because organic amendments affect aggregate fractions and nutrient content.…”

Section: Introductionsupporting

confidence: 84%

“…The α‐diversity of the bacterial communities decreased in PM treatment because of competition between allochthonous bacterial taxa and native bacterial taxa in the macroaggregates. In the BC amendment, the lower ability of soil aggregate formation could be attributed to its highly aromatic structures and low solubility (Dai et al, ). The bacterial community in small particles of soil lacks physical protection.…”

Section: Discussionmentioning

confidence: 99%

“…ST is rich in organic macromolecules, which may be broken down into polysaccharides, proteins, and humic substances (Peng, Ye, Wang, Zhou, & Sun, ). These components, as cementing agents, are primarily transferred to larger aggregates for soil aggregation (Dai et al, ). Undoubtedly, BR contains large quantities of N and abundant nutrient elements (Nkoa, ), and it is broken down more easily to support bacterial growth in the smaller fractions.…”

Section: Discussionmentioning

confidence: 99%

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Linking bacterial community to aggregate fractions with organic amendments in a sandy soil

et al. 2019

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Soil aggregates provide microhabitats for microorganisms. However, the bacterial communities within various aggregate size fractions under organic amendments have rarely been evaluated especially in sandy soils. A field experiment involving addition of biogas residue (BR), pig manure (PM), biochar (BC), and straw (ST) of a sandy soil was performed to determine the structure of the bacterial community in aggregate size fractions by using high‐throughput sequencing. We found that organic amendments change soil aggregate fractions and nutrient content, alter bacterial diversity and composition, and contribute to the predicted bacterial functions. The BR increased bacterial α‐diversity in <0.25‐mm aggregates. The Nitrospirae was abundant in almost all aggregate sizes, whereas the abundance of Actinobacteria decreased in most of aggregates following BR addition. The PM amendment primarily facilitated the growth of Bacteroidetes and inhibited the growth of Acidobacteria and Chloroflexi in 0.25‐ to 2‐mm aggregates, whereas bacterial α‐diversity was decreased in the >0.25‐mm aggregates. The BC treatment decreased the bacterial α‐diversity in the <0.25‐mm aggregates and the Gemmatimonadetes abundance in all <2‐mm aggregates, but the Actinobacteria abundance was significantly increased in the >0.053‐mm aggregates. Collectively, the effects of organic amendments on the bacterial community varied greatly depending on type of amendments and aggregate size. The BR supported highly diverse bacterial taxa in the <0.25‐mm aggregates, whereas it proliferated N cycling‐related bacteria in all aggregates. Our results highlight the links between bacterial community and aggregate size fractions in sandy soils depending on organic amendments.

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Water-stable aggregates and carbon accumulation in barren sandy soil depend on organic amendment method: A three-year field study

Cited by 76 publications

References 60 publications

Implications of Water Stress and Organic Fertilization on Growth, Yield and Water Productivity of Cauliflower (Brassica oleracea Var. Botrytis, L.)

Implications of Water Stress and Organic Fertilization on Growth, Yield and Water Productivity of Cauliflower (Brassica oleracea Var. Botrytis, L.)

Comparison of the effects of different maize straw returning methods on saline soil improvement

Linking bacterial community to aggregate fractions with organic amendments in a sandy soil

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