Dual benefits of long-term ecological agricultural engineering: Mitigation of nutrient losses and improvement of soil quality

Li, Hongying; Zhu, Ningyuan; Wang, Sichu; Gao, Min; Xia, Lizhong; Kerr, Philip G.; Wu, Yonghong

doi:10.1016/j.scitotenv.2020.137848

Cited by 27 publications

(14 citation statements)

References 58 publications

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“…The cumulative contribution rate of soil indicators in the MDS constructed in this study was 63.98%, and correlation analysis showed that each soil index was significantly correlated with the construction of MDS soil indicators. Soil organic matter, soil available potassium, soil available phosphorus and soil nitrate nitrogen play an important role in constructing the MDS of soil nutrient evaluation [43]. Different factors are selected to participate in the evaluation of soil quality, leading to slightly different key factors in the final evaluation.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Potato Farmland Soil Nutrient Based on MDS-SQI Model in the Loess Plateau

et al. 2021

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Soil nutrients are essential nutrients provided by soil for plant growth. Most researchers focus on the coupling effect of nutrients with potato yield and quality. There are few studies on the evaluation of soil nutrients in potato fields. The purpose of this study is to investigate the soil nutrients of potato farmland and the soil vertical nutrient distributions, and then to provide a theoretical and experimental basis for the fertilizer management practices for potatoes in Loess Plateau. Eight physical and chemical soil indexes were selected in the study area, and 810 farmland soil samples from the potato agriculture product areas were analyzed in Northern Shaanxi. The paper established the minimum data set (MDS) for the quality diagnosis of the cultivated layer for farmland by principal component analysis (PCA), respectively, and furthermore, analyzed the soil nutrient characteristics of the cultivated layer adopted soil quality index (SQI). The results showed that the MDS on soil quality diagnosis of the cultivated layer for farmland soil included such indicators as the soil organic matter content, soil available potassium content, and soil available phosphorus content. The comprehensive index value of the soil quality was between 0.064 and 0.302. The SPSS average clustering process used to classify SQI was divided into three grades: class I (36.2%) was defined as suitable soil fertility (SQI < 0.122), class II (55.6%) was defined as moderate soil fertility (0.122 < SQI < 0.18), and class III (8.2%) was defined as poor soil fertility (SQI > 0.186). The comprehensive quality of the potato farmland soils was generally low. The proportion of soil nutrients in the SQI composition ranged from large to small as the soil available potassium content = soil available phosphorus content > soil organic matter content, which became the limiting factor of the soil organic matter content in this area. This study revolves around the 0 to 60 cm soil layer; the soil fertility decreased gradually with the soil depth, and had significant differences between the respective soil layers. In order to improve the soil nutrient accumulation and potato yield in potato farmland in northern Shaanxi, it is suggested to increase the fertilization depth (20 to 40 cm) and further study the ratio of nitrogen, phosphorus, and potassium fertilizer.

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Section: Discussionmentioning

confidence: 99%

Assessment of Potato Farmland Soil Nutrient Based on MDS-SQI Model in the Loess Plateau

et al. 2021

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“…This may be due to soil properties where metal concentrations could be affected. 14,15 Fiber Quality Parameters…”

Section: Metal Ionsmentioning

confidence: 99%

The Effects of Two Field Conditions on Metal Ion Concentrations in Cotton Fibers

Fortier¹,

Zumba²,

Rodgers³

et al. 2021

aatcc j res

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Access to water sources is critical because it can affect cotton fiber growth, yields, and quality. It is of interest to determine how a water-limited field environment compares to a well-watered environment, especially when it comes to how cotton quality and surface characteristics are affected. In the current investigation, metal ion quantities were monitored using inductively coupled plasma-optical emission spectroscopy (ICP-OES). The effect of variety and field treatments on high volume instrument (HVI) parameters were examined. The results were quite variable overall, with reflectance (Rd) and strength having the least statistically different means among the quality parameters.

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“…This urgency underscores the need for a soil protection plan to alleviate soil acidi cation using easy-operation, low-cost and effective technologies. Ecological agricultural engineering that manifests long-term dual bene ts -reductions of nutrient and soil losses, and improvements to soil quality, is encouraged 43 . For a long term perspective, we appeal to a national policy to support the continued running of the TGPEEMS, and the inclusion of soil quality and soil health parameters in the TGPEEMS for a comprehensive understanding and assessment of the environmental consequences of TGP.…”

Section: Main Textmentioning

confidence: 99%

The Three Gorges Dam accelerates acidification of upland soils

Sun

Wang

et al. 2020

Preprint

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Large hydroelectric dams have provided extensive benefits in supporting human socio-economic development but their environmental footprint has come under increasing scrutiny. Lack of continued long-term monitoring of the environment remains a key constraint to the understanding of the correlation between dam operation and the environmental changes. Here we assess the impact of the Three Gorges Dam on upland soils in the reservoir area. By tracking the changing of pH value, a general indicator of soil health, over a period spanning nearly three decades before and after the dam construction, we observe continuous pH decline evidencing ongoing soil acidification. In addition to the intensive proton supply from applied fertilizers, the presence of the megaproject is believed to be a major driver of the accelerated soil acidification. Further analysis reveals that the shifts of microclimatic conditions as a result of the dam leads to the enhanced decomposition of organic species and the concomitant loss of exchangeable base cations, which contribute additional protons to soil and reduce soil acid-buffering capacity, respectively. Our findings identify the ecological impacts of the world’s largest dam and suggest the urgency to initiate environmental protection measures for improved sustainability.

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Dual benefits of long-term ecological agricultural engineering: Mitigation of nutrient losses and improvement of soil quality

Cited by 27 publications

References 58 publications

Assessment of Potato Farmland Soil Nutrient Based on MDS-SQI Model in the Loess Plateau

Assessment of Potato Farmland Soil Nutrient Based on MDS-SQI Model in the Loess Plateau

The Effects of Two Field Conditions on Metal Ion Concentrations in Cotton Fibers

The Three Gorges Dam accelerates acidification of upland soils

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