Gradient of decomposition in sugarcane mulches of various thicknesses

Dietrich, Guilherme; Recous, Sylvie; Pinheiro, Patrick Leal; Weiler, Douglas Adams; Schu, Adriane Luiza; Rambo, Mathias Roberto Leite; Giacomini, Sandro José

doi:10.1016/j.still.2019.04.022

Cited by 22 publications

(17 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2), and 32 such plots were established in total. According to the "Technical specification for the application of organic mulch on urban and rural greening" of Shanghai, China, and related literature (Dietrich et al 2019;Zhang et al 2020), we applied three treatments: 35, 70, and 140 kg of mulch/tree, along with a crosscheck control (CK) without mulch. The organic mulch extended evenly 80 cm away from the trunk, allowing for a buffer (>0.5 m) between the trees, and was carefully mounded around each tree as uniformly as possible to a height of 5, 10, or 20 cm above the ground (OM5, 35 kg mulch; OM10, 70 kg mulch; OM20, 140 kg mulch).…”

Section: Experimental Designmentioning

confidence: 99%

Response of nitrogen fractions in the rhizosphere and bulk soil to organic mulching in an urban forest plantation

Sun

Wang

et al. 2021

J. For. Res.

View full text Add to dashboard Cite

Nitrogen is an essential component in forest ecosystem nutrient cycling. Nitrogen fractions, such as dissolved nitrogen, ammonium, nitrate, and microbial biomass nitrogen, are sensitive indicators of soil nitrogen pools which affect soil fertility and nutrient cycling. However, the responses of nitrogen fractions in forest soils to organic mulching are less well understood. The rhizosphere is an important micro-region that must be considered to better understand element cycling between plants and the soil. A field investigation was carried out on the effect of mulching soil in a 15-year-old Ligustrum lucidum urban plantation. Changes in total nitrogen and nitrogen fractions in rhizosphere and bulk soil in the topsoil (upper 20 cm) and in the subsoil (20–40 cm) were evaluated following different levels of mulching, in addition to nitrogen contents in fine roots, leaves, and organic mulch. The relationships between nitrogen fractions and other measured variables were analysed. Organic mulching had no significant effect on most nitrogen fractions except for the rhizosphere microbial biomass nitrogen (MBN), and the thinnest (5 cm) mulching layer showed greater effects than other treatments. Rhizosphere MBN was more sensitive to mulching compared to bulk soil, and was more affected by soil environmental changes. Season and soil depth had more pronounced effects on nitrogen fractions than mulching. Total nitrogen and dissolved nitrogen were correlated to soil phosphorus, whereas other nitrogen fractions were strongly affected by soil physical properties (temperature, water content, bulk density). Mulching also decreased leaf nitrogen content, which was more related to soil nitrogen fractions (except for MBN) than nitrogen contents in either fine roots or organic mulch. Frequent applications of small quantities of organic mulch contribute to nitrogen transformation and utilization in urban forests.

show abstract

Section: Experimental Designmentioning

confidence: 99%

Response of nitrogen fractions in the rhizosphere and bulk soil to organic mulching in an urban forest plantation

Sun

Wang

et al. 2021

J. For. Res.

View full text Add to dashboard Cite

show abstract

“…Under tropical climatic conditions with high temperatures and with rainfall or irrigation water inputs of 2000-3000 mm•year −1 , visual observations showed that sugarcane mulch is almost completely degraded after one year, and this was confirmed by mulch mineralisation studies [8,14]. Thus, the chemical elements released by the mineralisation of this mulch mainly contribute to the current crop cycle [14]. The contribution mainly depends on the amount of mulch.…”

Section: Introductionmentioning

confidence: 87%

“…Sugarcane mulch may be left on the soil after harvest, mainly to protect the soil from erosion, reduce the quantity of weeds, conserve soil moisture, and provide nutrients during its mineralisation [11]. Quantities of sugarcane mulch often reach several tens of tons of dry matter per hectare [8,12], and immediately after harvest, its thickness may reach ten to twenty centimetres [13,14]. Under tropical climatic conditions with high temperatures and with rainfall or irrigation water inputs of 2000-3000 mm•year −1 , visual observations showed that sugarcane mulch is almost completely degraded after one year, and this was confirmed by mulch mineralisation studies [8,14].…”

Section: Introductionmentioning

confidence: 99%

“…Quantities of sugarcane mulch often reach several tens of tons of dry matter per hectare [8,12], and immediately after harvest, its thickness may reach ten to twenty centimetres [13,14]. Under tropical climatic conditions with high temperatures and with rainfall or irrigation water inputs of 2000-3000 mm•year −1 , visual observations showed that sugarcane mulch is almost completely degraded after one year, and this was confirmed by mulch mineralisation studies [8,14]. Thus, the chemical elements released by the mineralisation of this mulch mainly contribute to the current crop cycle [14].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Fertilisation Using Organic Waste Products with Mineral Complementation on Sugarcane Yields and Soil Properties in a 4 Year Field Experiment

Feder

2021

Agriculture

View full text Add to dashboard Cite

Sugarcane cultivation is suitable for the exploitation of organic waste products. However, minimum complementary mineral input is necessary for optimal fertilisation. Control mineral fertilisation treatments with mulch (MCM) or without mulch (MC) were compared with two organic waste treatments, a pig slurry with mulch (PSM) and without mulch (PS), and a sugarcane vinasse with mulch (SVM) and without mulch (SV) on a Nitisol in French Reunion Island. The sugarcane yields obtained with the different treatments differed each year. However, no trend was observed and no significant and recurrent effect of the presence of mulch or of the different treatments was identified over the course of the 4 year experiment. Soil pHw and pH KCl measured in the different treatments increased from year 3 in with the treatments including organic waste products (PS, PSM, SV and SVM) but remained constant with the treatments including only mineral fertilisation (MC and MCM). With the exception of PS and PSM, which were significantly higher in year 4, soil organic carbon content was not modified by the treatments. Soil cation exchange capacity increased only slightly with the PS and PSM treatments from year 3 on. The differences in yields and soil properties can be explained by the nature of the organic waste products, the accumulation of nutrients after several applications, and the specific characteristics of the sugarcane crop. The improvement in soil properties from the third year on was not reflected in the yield of sugarcane because it was too weak, and the crop explores a much larger volume of soil.

show abstract

“…Fresh organic material on mulch could create spots of microbial activity where new soil aggregates are developed, but the decomposition rate of organic material is important for soil aggregation (Zhong et al 2019;Modak et al 2020). Generally, the lignin content of wood chips were higher so its rate of degradation was lower than for the wood compost (Wang et al 2014b;Dietrich et al 2017Dietrich et al , 2019. Two years after application, wood chips had not decomposed on the soil surface, making it difficult to promote microbial activity and increase microbial-derived binding agents.…”

Section: Effects Of Mulching On Soil Aggregate Binding Agentsmentioning

confidence: 99%

Effects of organic mulching on soil aggregate stability and aggregate binding agents in an urban forest in Beijing, China

Zhou

Sun

et al. 2021

J. For. Res.

View full text Add to dashboard Cite

Urban forest soil is often disturbed by rapid urbanization. Organic mulching is effective for improving soil quality and aggregate stability. This study evaluated how soil binding agents changed aggregate stability through organic mulching in urban forest soils. Three treatments were applied in Jiufeng National Forest Park, Beijing: (1) no organic mulch (control); (2) wood chips alone (5 cm thickness); and, (3) wood chips + wood compost (This mulch was divided into two layers, the upper layer of wood chips (2.5 cm), the lower layer wood compost (2.5 cm)). Soil samples were collected from the surface 10- cm soil layer and fraction into four aggregates. Glomalin-related soil protein and soil organic carbon were measured in bulk soil and the four aggregates. The results show that wood chips + wood compost increased the proportion of large and small macroaggregates, mean weight diameter and geometric mean diameter. The total and easily extractable glomalin-related soil protein were higher in the wood chips + wood compost. However, soil organic carbon was lower in the wood chips alone application compared to the controls and wood chips + wood compost. Easily extractable / total glomalin-related soil protein and glomalin-related soil protein / soil organic carbon ratios of wood chips alone and wood chips + wood compost had increased trend compared to the controls but did not reach significant levels (p > 0.05). Mean weight diameter and geometric mean diameter correlated positively with total and easily extractable glomalin-related soil protein but were not positively correlated with soil organic carbon, the ratios of easily extractable and total glomalin-related soil protein, and the ratios of glomalin-related soil protein and soil organic carbon. Redundancy analysis revealed that total glomalin-related soil protein was the most important driver for soil aggregate stability, especially the total glomalin-related soil protein of small macroaggregates. The results suggest that wood chips + wood compost enhanced soil aggregate stability through the increase of glomalin-related soil protein. Wood chips alone cannot enhance soil aggregate stability in urban forests in the short term.

show abstract

Gradient of decomposition in sugarcane mulches of various thicknesses

Cited by 22 publications

References 38 publications

Response of nitrogen fractions in the rhizosphere and bulk soil to organic mulching in an urban forest plantation

Response of nitrogen fractions in the rhizosphere and bulk soil to organic mulching in an urban forest plantation

Effects of Fertilisation Using Organic Waste Products with Mineral Complementation on Sugarcane Yields and Soil Properties in a 4 Year Field Experiment

Effects of organic mulching on soil aggregate stability and aggregate binding agents in an urban forest in Beijing, China

Contact Info

Product

Resources

About