Function of Nitrate Ion and Tea Saponin Application Rates in Anerobic PAH Dissipation in Paddy Soil

2016 ◽  
Vol 44 (6) ◽  
pp. 667-676 ◽  
Author(s):  
Mingming Sun ◽  
Mao Ye ◽  
Fangyuan Shen ◽  
Jingjing Xu ◽  
Chenglong Ye ◽  
...  
Keyword(s):  
Paddy Soil ◽  
Nitrate Ion ◽  
Tea Saponin ◽  
Application Rates ◽  
Pah Dissipation

scholarly journals Co-Amendment of S and Si Alleviates Cu Toxicity in Rice (Oryza Sativa L.) Grown on Cu-Contaminated Paddy Soil

2018 ◽  
Vol 16 (1) ◽  
pp. 57
Author(s):  
Zhihong Lu ◽  
Xiao Yan ◽  
Zongqiang Wei ◽  
Jianfu Wu
Keyword(s):  
Paddy Soil ◽  
Oryza Sativa L ◽  
Brown Rice ◽  
Rice Root ◽  
Application Rates ◽  
Sulfur Addition ◽  
Cu Contamination ◽  
S Application ◽  
Cu Uptake ◽  
Contaminated Paddy Soil

With irrigation using waste water, application of sewage sludge, and development of mine exploration, copper (Cu) contamination in some paddy fields has become increasingly serious. A greenhouse pot experiment was conducted using a factorial design with three sulfur (S) application rates (i.e., 0, 0.013, and 0.026 g S kg−1 soil) and three silicon (Si) application rates (i.e., 0, 0.05, and 0.1 g Si kg−1 soil) to test the effect of co-amendment of S and Si on alleviating Cu contamination in paddy soil. There were significant interaction effects between S and Si on soil Cu speciation and Cu uptake by rice plants (except brown rice). Sulfur addition decreased the content of soil-exchangeable Cu, whereas Si addition decreased the content of soil-reducible Cu, suggesting that co-amendment of S and Si generally reduced Cu availability. Copper was biominimized in the soil-rice plant system and rice root had the greatest Cu concentration (163–285 mg kg−1). Co-amendment of S and Si decreased the translocation of Cu from soil to rice root, possibly due to decreased soil Cu mobility and enhancement of the formation of iron plaque on rice root. Co-amendment of S-Si at a rate of 0.013 (S)–0.1 (Si) g kg−1 soil, respectively, was the optimal among all treatments.

scholarly journals The Remediation Strategy and Mechanism of Combined Passivation and Foliar Inhibition for Safe Rice Production in Red Paddy Soil Contaminated With Heavy Metals

2021 ◽  
Author(s):  
Fengsong Zhang ◽  
Lixia He ◽  
Guixiang Zhang ◽  
Zhuo Wei ◽  
Jiaqi Wang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Paddy Soil ◽  
Threshold Value ◽  
Soil Samples ◽  
Safety Standard ◽  
Application Rates ◽  
Rice Samples ◽  
Safety And Stability ◽  
Total P ◽  
Red Paddy Soil

Abstract To solve the problem of Cd in rice over the food-safe standard, the present field study was carried out to explore the combined passivators (a mixture of quicklime (Q), polyacrylamide (A), sepiolite (S)) and Si-/Se- containing foliar inhibitors (Si or Se) at low (1) and high (2) application rates were added into the red paddy soil. After harvest the rice, the soil samples were collected to examine the soil properties, bacterial community, and the availability of heavy metals (Cd, Pb, and Cu) in soil. The rice samples were obtained to investigate the accumulation of heavy metals by rice. All of the treatments increased the soil's pH, but the treatments excluding QSe2 decreased the total P and soil organic matter (SOM), which was favourable for the immobilisation of heavy metals in red paddy soil by decreasing 14.29%-42.86% of available Cd, 10.18%-63.17% of available Pb, and 6.95%-36.81% of available Cu. With the increasing application rates, QAS significantly decreased the heavy metals available because of the enhanced immobilisation, while QSi and QSe significantly increased the heavy metals available because of the inhibited plant uptake. After remediation, QA1, QSi2, and QSe2 most effectively decreased the uptake Cd by rice in the present red paddy soil to solve the problem of Cd exceeding the threshold value according to the National Food Safety Standard of China (GB2762-2017). Additionally, the treatments, with the exception of Q1, QA1, QSi1, and QSi2, did not dramatically change the community structure of bacteria at the genus level in soil. Considering the safety and stability of soil, QSe2 was the primary recommendation for remediating Cd-contaminated red paddy soil.

Environmental Benefits of Precision Agriculture Adoption

2020 ◽  
pp. 637-656 ◽  
Author(s):  
Marco Medici ◽  
Søren Marcus Pedersen ◽  
Giacomo Carli ◽  
Maria Rita Tagliaventi
Keyword(s):  
Environmental Impacts ◽  
Precision Agriculture ◽  
New Technologies ◽  
Environmental Benefits ◽  
Herbicide Application ◽  
Pesticide Application ◽  
Policy Makers ◽  
Application Rates ◽  
Biodiversity Policy ◽  
Lime Application

The purpose of this study is to analyse the environmental benefits of precision agriculture technology adoption obtained from the mitigation of negative environmental impacts of agricultural inputs in modern farming. Our literature review of the environmental benefits related to the adoption of precision agriculture solutions is aimed at raising farmers' and other stakeholders' awareness of the actual environmental impacts from this set of new technologies. Existing studies were categorised according to the environmental impacts of different agricultural activities: nitrogen application, lime application, pesticide application, manure application and herbicide application. Our findings highlighted the effects of the reduction of input application rates and the consequent impacts on climate, soil, water and biodiversity. Policy makers can benefit from the outcomes of this study developing an understanding of the environmental impact of precision agriculture in order to promote and support initiatives aimed at fostering sustainable agriculture.

Determination of Nitrate Ion in Cheese and Sake

2020 ◽  
Vol 61 (6) ◽  
pp. 229-234
Author(s):  
Takahiro Sasaki ◽  
Shoichi Tahara ◽  
Ritsuko Toyohara ◽  
Mari Morikawa ◽  
Narue Sakamaki ◽  
...  
Keyword(s):  
Nitrate Ion

AMOUNT AND STRUCTURE OF THE BIOLOGICAL FERTILITY OF SOYA, DEPENDING ON THE SYSTEM OF MAIN TILLAGE OF SOIL AND MEASURES TO OPTIMIZE NUTRITION MODE

2020 ◽  
Author(s):  
M. Novokhatskyi ◽  
◽  
V. Targonya ◽  
T. Babinets ◽  
O. Gorodetskyi ◽  
...  
Keyword(s):  
Field Experiments ◽  
Optimal Number ◽  
Soil Tillage ◽  
Forest Steppe ◽  
Biological Productivity ◽  
Tillage Systems ◽  
Application Rates ◽  
Tillage System ◽  
Biological Yield ◽  
The Impact

Aim. Assessment of the impact of the most common systems of basic tillage and biological methods of optimization of nutrition regimes on the realization of the potential of grain productivity of soybean in the Forest-Steppe of Ukraine. Methods. The research used general scientific (hypothesis, experiment, observation) and special (field experiment, morphological analysis) methods Results. The analysis of the results of field experiments shows that the conservation system of soil cultivation, which provided the formation of 27.6 c/ha of grain, is preferable by the level of biological yield of soybean. The use of other systems caused a decrease in the biological yield level: up to 26.4 c/ha for the use of the traditional system, up to 25.3 c/ha for the use of mulching and up to 23.0 c/ha for the use of the mini-till. With the use of Groundfix, the average biological yield of soybean grain increases to 25.6 c / ha for application rates of 5 l/ha, and to 28.2 c/ha for application rates of 10 l/ha when control variants (without the use of the specified preparation) an average of 22.6 c/ha of grain was formed with fluctuations in soil tillage systems from 21.0 (mini-bodies) to 25.8 c/ha (traditional).The application of Groundfix (10 l/ha) reduced the seed abortion rate from 11.0% (average without biofertilizer variants) to 8.0%, forming the optimal number of stem nodes with beans, increasing the attachment height of the lower beans and improving other indicators of biological productivity soybeans. Conclusions. It has been found that the use of the canning tillage system generates an average of 27.6 cent soybean grains, which is the highest indicator among the main tillage systems within the scheme of our research. The use of Groundfix caused a change in this indicator: if the variants with a conservative system of basic tillage without the use of biological preparation (control) were formed on average 24.1 c/ha, the use of Ground Licks caused the increase of biological productivity up to 29.4 c/ha, and at a dose of 10 l/ha biological yield was 32.2 c/ha. It was found that both the use of Groundfix and the basic tillage system influenced the elements of the yield structure: the density of the plants at the time of harvest depended more on the tillage system than on the use of Groundfix; the use of Groundfix and increasing its dose within the scheme of our studies positively reflected on the density of standing plants; the height of attachment of the lower beans and reduced the abortion of the seeds.

Effect of long-term fertilization on archaeal community structure in cal-careous purplish paddy soil

2011 ◽  
Vol 19 (3) ◽  
pp. 369-376
Author(s):  
Gu Yunfu ◽  
Zhang Xiaoping ◽  
Tu Shihua ◽  
Lindström Kristina
Keyword(s):  
Community Structure ◽  
Paddy Soil ◽  
Archaeal Community

Diversity of Microbial Community of Paddy Soil Types in Double-Rice Crop-ping System

2010 ◽  
Vol 36 (5) ◽  
pp. 826-832
Author(s):  
Chuan-Deng YI ◽  
Li-Hong WANG ◽  
Xiao-Ping XIAO ◽  
Guang-Li YANG ◽  
Yue-Gao HU ◽  
...  
Keyword(s):  
Microbial Community ◽  
Paddy Soil ◽  
Rice Crop ◽  
Soil Types ◽  
Double Rice

Influence of Long-term Fertilizations on Nutrients and Fungal Communities in Typical Paddy Soil of South China

2017 ◽  
Vol 43 (2) ◽  
pp. 286 ◽  
Author(s):  
Dan-Mei CHEN ◽  
Ling YUAN ◽  
Jian-Guo HUANG ◽  
Jian-Hua JI ◽  
Hong-Qian HOU ◽  
...  
Keyword(s):  
South China ◽  
Paddy Soil ◽  
Fungal Communities
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