Nutrient composition of diverse organic residues and their long-term effects on available nutrients in a tropical sandy soil

Abstract

Intensive use of sandy soils for agriculture leads to significant land degradation. The application of locally available organic residues can improve soil fertility, particularly in the context of organic farming practices. This research examined nutrient concentrations in locally available organic residues with different biochemical compositions/qualities and investigated the effects of long-term application of these residues on available nutrients, such as P, K, Ca, Mg, Fe, Mn, and Zn, as well as on total organic carbon (TOC) accumulation in tropical sandy soil. A field experiment was conducted in Northeast Thailand, where four local organic residues, groundnut stover (GN), tamarind leaf litter (TM), dipterocarp leaf litter (DP), and rice straw (RS), had been applied annually for 22 years. These organic residues were acidic (pH 3.7–5.8). The macronutrients N, P, and K were present at elevated levels in the high-quality organic residue GN, whereas medium-quality TM and low-quality RS and DP were dominated by the macronutrients Ca and Mg and the micronutrients Fe, Mn, and Zn. The incorporation of organic residues, particularly TM, resulted in the accumulation of TOC. Furthermore, long-term incorporation of TM increased soil pH, whereas incorporation of GN, DP, and RS did not. The higher increase in the soil pH of TM soil is likely because TM contains higher levels of ash alkalinity compared to other residues. The application of medium-quality TM increased the soil available P, Ca, and Mg, whereas low-quality organic residue RS and DP applications increased the concentrations of soil micronutrients (e.g., Mn and Zn). However, long-term applications of local organic residues did not increase available K in the sandy soil.

Actinobacterial and fungal strain-enriched wheat straw as an effective strategy for alleviating the effect of salinity stress on soil chemical and biochemical properties

“…Our results showed that the use of wheat residues positively improved soil P ava , K ava and TN. This result is consistent with the results reported by Sukitprapanon et al [37]. The highest amount of P ava is related to the second incubation month, which is probably due to the decrease in MBP in the second incubation month and the increase in phosphorus mineralization in the soil (Fig.…”

“…This result shows that despite the salinity, due to the adaptation of microorganisms to the stress, microbiological activity in the mineralization process of nitrogen still occurs over time, thus promoting the mineralization of nitrogen [38]. The use of organic residues has environmental benefits, such as accumulation of soil organic carbon and reduction of greenhouse gases and availability of plant nutrients in soil [37].…”

Characterizing Physical and Chemical Properties of Sandy Soil in Vietnamese Mekong Delta Province

“…In general, the sandy soil area in Tra On district has a less acidic than that in Vung Liem district. Sandy soils are usually strongly acidic with pH KCl in the range 4.5-5.5 (Sukitprapanon et al, 2020). According to Giang et al (2021) The suitable pH KCl for the growth and development of terrestrial crops is in the range from 5.5 to 6.5.…”

Reuse of Pruning Waste from Subtropical Fruit Trees and Urban Gardens as a Source of Nutrients: Changes in the Physical, Chemical, and Biological Properties of the Soil

“…This also applies to garden wastes that, in certain areas, such as the subtropical coast of Andalusia (S Spain), can be used for nutrient supplementation. Among other factors, the waste quality depends on the C:N and lignin:N ratios [6,16,17], the P and K contents [18,19], and the lignin proportion [20]. As shown in previous studies [21], nutrient release can alter soil microbial activity.…”

“…Studies concerning Na, Ca, and Mg dynamics in soils after the spreading of crop wastes report correlations among these nutrients and with soil quality [6]. Nevertheless, data on the inputs of micronutrients (Fe, Mn, Cu, and Zn) are widely unavailable.…”