Influence of the Application Rate of Organic Manure on Nitrate Migration and Accumulation in Greenhouse Soil

Niu, Mingfen; Zhang, Di; Wang, Shaojun; Zhao, Muqiu

doi:10.1109/cdciem.2011.297

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…If any value exceeds the set limit -the appropriate mechanisms are activated. Thus, at low light levels, the LED strip will turn on, in case of insufficient soil moisture -watering, and at high temperatures, ventilation will turn on [9]. By turning these mechanisms on and off, the system changes information about their status.…”

Section: Principle Of Construction Of Hardware Component Of Systemmentioning

confidence: 99%

Investigation of Greenhouse Monitoring and Control System

Sahaidak¹,

Huzynets²

2021

ACPS

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Unsuitable climatic conditions, various natural disasters and instability and unpredictability of the weather significantly complicate cultivation, and sometimes make it even impossible. To ensure the best conditions for cultivation and the highest yields, farmers began to use greenhouses. However, in our hectic lives, people are constantly busy with something and there is no enough time. Long trips, business trips, vacations are also possible. It is becoming increasingly difficult to provide the necessary conditions for plants to grow on their own. That is why the Internet of Things has been so successfully integrated with agriculture that it has led to the emergence of automated or intelligent greenhouses. The article attempts to analyze the types of greenhouse monitoring and control system, their technical characteristics, principles of operation and basic requirements for these systems. According to the results of the study, the best smart greenhouses have been selected. The main functions of automated greenhouses have been described. Selection criteria have been determined and a comparative analysis of the most popular products available on the market.

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Section: Principle Of Construction Of Hardware Component Of Systemmentioning

confidence: 99%

Investigation of Greenhouse Monitoring and Control System

Sahaidak¹,

Huzynets²

2021

ACPS

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“…It was observed that the sand+OM did not favour the nitrification process. This is possibly due to the presence of higher numbers of microorganisms in the media (Stark & Firestone, 1995;Bottomley et al, 2004) or the decaying of organic manure may have released nitrate (Sommerfeldt et al, 1998;Niu et al, 2011) into the soil solution or both may have taken place in the sand+OM column. In contrast, sand+clay column shows a slower rate of increase.…”

Section: Nitrate Retention In Sands Mixed With Claymentioning

confidence: 99%

Fate of urea fertilizers in sandy aquifers: laboratory and field case study from Kalpitiya, Sri Lanka

Jayasingha¹,

Pitawala²,

Dharmagunawardhana³

2013

J. Natn. Sci. Foundation Sri Lanka

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Abstract:High nitrate (NO 3 -) levels in groundwater are attributed to fertilizer leaching from sandy soil. A simulation laboratory study was performed to investigate the fate of leached urea in an agricultural field in Kalpitiya and the enhancement of fertilizer retention in sandy soil. A field experiment was conducted to investigate the effectiveness of using nutrient rich groundwater to reduce the nitrate levels in the Kalpitiya aquifer. Nitrate retention experiment revealed that increasing clay up to 15 % increased the retention by > 50 % with an efficiency of 3.7 % and the retention is conversely correlated with the quantity of clay. A soil column experiment showed that nitrate concentration of leachate increases rapidly for an initial period of 250 hours and then started to decrease gradually. Initial nitrification followed by denitrification reactions may be the causative factors for this behaviour. The study further revealed that clay and organic manure are potential sinks of nitrate while the latter is also a source of nitrate. Gradual building up of nitrate in the groundwater of the aquifer system appears to be due to available favourable conditions for continuous nitrification while cycling through the aquifer due to intensive irrigation. This field case study reveals that a polluted aquifer can probably be recovered by reusing the nitrate contaminated groundwater as a source of fertilizer for the crops cultivated on the land above the aquifer allowing longer contact time for plant uptake. The process can gradually purify the groundwater while allowing farmers to use less nitrate fertilizers.

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Influence of the Application Rate of Organic Manure on Nitrate Migration and Accumulation in Greenhouse Soil

Cited by 2 publications

References 12 publications

Investigation of Greenhouse Monitoring and Control System

Investigation of Greenhouse Monitoring and Control System

Fate of urea fertilizers in sandy aquifers: laboratory and field case study from Kalpitiya, Sri Lanka

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