scholarly journals Fertilizer Management for Drip-irrigated Vegetables in Florida

1992 ◽  
Vol 2 (1) ◽  
pp. 27-32 ◽  
Author(s):  
G.J. Hochmuth
Keyword(s):  
Water Use ◽  
Potential Risk ◽  
Drip Irrigation ◽  
Nutrient Management ◽  
Sandy Soils ◽  
Fertilizer Application ◽  
Fertilizer Efficiency ◽  
Vegetable Crops ◽  
Fertilizer Management ◽  
Surface And Groundwater

Fertilizer application by drip irrigation is becoming a common practice for many vegetable crops, especially in Florida. Vegetable producers view drip irrigation as a tool to reduce water use, increase fertilizer efficiency, and improve profits, while simultaneously reducing the potential risk to the environment due to nutrient enrichment of surface and groundwater. This paper presents the current Univ. of Florida recommendations for fertilizer management with drip irrigation for vegetables in Florida. These recommendations are based on more than 15 years of research on water and nutrient management with drip irrigation. Although these recommendations were developed for largely sandy soils from mostly Florida research, they should be easily adaptable for other U.S. vegetable regions on sandy soils.

scholarly journals Optimized Water and Fertilizer Management of Mature Jujube in Xinjiang Arid Area Using Drip Irrigation

Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1467 ◽  
Author(s):  
Zhenhua Wang ◽  
Qingyong Bian ◽  
Jinzhu Zhang ◽  
Bo Zhou
Keyword(s):  
Water Use ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Growth And Yield ◽  
Fertilizer Efficiency ◽  
Arid Areas ◽  
Fertilizer Management ◽  
Flood Irrigation ◽  
Irrigation Water Use ◽  
Use Efficiency

Studying water–fertilizer coupling effects in a drip irrigation system is critical for sustainable agricultural development in arid areas, such as that of Xinjiang in China, to find out the optimized water and fertilizer management. Therefore, a two-year field experiment was conducted to find out how the combination of three levels of irrigation quotas and three levels of fertilizer amounts would affect the physiological and growth indexes of jujube, as well as ascertain the differences between drip irrigation and flood irrigation. The results showed that the interacted and coupled effects of irrigation and fertilization influenced most of the physiological indicators and growth indexes. On the other hand, the physiological and growth indexes were increased after transferring flood irrigation to drip irrigation, as the maximum chlorophyll content (CC) and photosynthetic nitrogen use efficiency (PNUE) values increased on average by 6.00%, and 11.39% in 2016, and 1.47% and 6.83% in 2017, respectively. Undoubtedly, inappropriate water and fertilizer management had negative impacts on jujube growth and yield. Based on the treatments and results in this paper, low fertilizer and moderate irrigation would be the best choice. The crop yield, irrigation water use efficiency (iWUE), and fertilizer partial productivity (PFP) increased by 6.77%, 29.48%, and 193.62% in 2016, and similar increments were also found in 2017 of 6.17%, 78.72%, and 133.06%, respectively. This indicated that fertilizer efficiency was promoted along with water use, and in turn, the water amounts were adjusted by the amount of fertilizer that was applied. Based on a comprehensive consideration of the physiological and growth indexes, a mathematical model was established, and the optimized irrigation and fertilizer amounts of jujube in northern Xinjiang area were found to be 815 mm and 400 kg ha−1 (with N–P2O5–K2O proportioned at 2–1–1.5). The results that were obtained in this paper would provide theoretical reference to the sustainable development of jujube plantation using drip irrigation in the arid areas.

scholarly journals Evaluation of Shallow Subsurface Drip Irrigation for the Production of Acorn Squash

2016 ◽  
Vol 26 (4) ◽  
pp. 436-443 ◽  
Author(s):  
Timothy Coolong
Keyword(s):  
Water Use ◽  
Drip Irrigation ◽  
Block Design ◽  
Irrigation Treatment ◽  
Subsurface Drip Irrigation ◽  
Vegetable Crops ◽  
Set Point ◽  
Irrigation Water Use ◽  
Subsurface Drip ◽  
The Impact

Subsurface drip irrigation (SDI) has been increasingly used for the production of numerous agronomic crops and a limited number of vegetable crops. To determine the impact of SDI compared with surface drip irrigation (SUR), a study was conducted in 2011 and 2012 with ‘Table Queen’ acorn squash (Cucurbita pepo var. turbinata) with irrigation initiated at 75% and 50% plant available water (PAW). The study was arranged as a factorial randomized complete block design and plants were grown with two irrigation types (SUR or SDI) and two tensiometer-controlled irrigation regimes. Results from 2011 suggested that SDI used less water compared with SUR at each irrigation set point. However, in 2012, significantly more water was used in all treatments due to warmer temperatures and less rainfall. In 2012, SDI used more water than SUR treatments at the same irrigation set point. In 2012, yield was affected by irrigation treatment. Plants grown using SUR irrigating at 75% PAW had greater numbers of fruit compared with other treatments. Furthermore, the highest yielding treatment had more than twice the number of irrigation events than the other treatments though the average lengths of irrigation events were shorter. Although overall yields were greater in 2012, irrigation water use efficiency (iWUE) was lower than in 2011 due to increased water use. These results suggest that while SDI may have some advantages over traditional SUR, environmental factors during growth can significantly impact the efficiency and productivity of each system.

scholarly journals Farmer participatory research in agricultural extension programs: A case study of fertilizer management in tropical rice

2020 ◽  
Vol 56 (5) ◽  
pp. 710-721
Author(s):  
Niño P. M. C. Banayo ◽  
Yoichiro Kato
Keyword(s):  
Nutrient Management ◽  
Canopy Cover ◽  
Crop Management ◽  
Agricultural Extension ◽  
Fertilizer Application ◽  
The Philippines ◽  
Growth Stages ◽  
Fertilizer Management ◽  
Farmer Participatory Research ◽  
Rice Farmer

AbstractAgricultural extension requires close communication with farmers, and researchers must consider farmers’ perspectives on crop management. Farmers tend to take into account the canopy appearance when they decide on fertilizer application, and this is often neglected in crop management recommendations by researchers. Our objectives were to dissect the growth characteristics that farmers implicitly account for in nutrient management of tropical rice. Farmer participatory trials were conducted in irrigated and rainfed lowlands in the Philippines during the wet seasons of 2014, 2015, and 2016. Each year, 30 participating farmers made decisions on fertilizer management for plots with different seedling ages and planting densities. These treatments greatly changed the canopy appearance, and affected farmer decisions on nitrogen (N) management, particularly in the first year. We found that plant height and leaf greenness were the major determinants of their decisions in irrigated lowlands. Under rainfed conditions, the risk of drought made farmers focus on tillering rather than plant elongation and leaf color during early growth stages, and on canopy cover and plant elongation during later stages. Across years and water regimes, farmers applied 78% more N than researchers without generally increasing grain yield. Since crop diagnosis is a key for successful management by farmers, guidelines for efficient nutrient management should include numerical targets for the traits emphasized by farmers. That will help farmers better understand their crops, and the guidelines will be more user-friendly than providing only a fertilizer application prescription.

scholarly journals Performance of Tomato under Subsurface Drip Irrigation Laterals placed at various Depths in Inceptisols

2021 ◽  
Vol 8 (01) ◽  
Author(s):  
D K SINGH ◽  
ANANT BAHADUR ◽  
S NS CHAURASIA ◽  
SHEKHAR SINGH
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Drip Irrigation ◽  
Maximum Yield ◽  
Soil Surface ◽  
Subsurface Drip Irrigation ◽  
Vegetable Crops ◽  
Use Efficiency ◽  
Subsurface Drip ◽  
Surface Drip Irrigation

Tomato is one of the important vegetable crops for nutrition security. The vegetables respond very well to proper irrigation water management towards increasing yield. A study on response of tomato under subsurface drip irrigation (SDI) with laterals placed at 5 cm, 10 cm and 15 cm depth below soil surface was carried out in inceptisols at ICAR- Indian Institute of Vegetable Research, Varanasi. It was found that soil water content variation was less and more favorable within top 30 cm depth of soil profile under SDI with lateral placed at 10 cm depth below soil surface. The maximum yield of tomato 52.85 t/ha was realized under SDI with lateral placed at 10 cm depth below soil surface followed by yield under 15 cm and 5 cm depth of lateral placement. It was 14.67% higher than the surface drip irrigation. The lowest yield of tomato was recorded 46.09 t/ha with surface drip irrigation. Maximum water use efficiency 1.968 t/ha-cm was obtained with SDI lateral placed at 10 cm depth below soil surface. To realize maximum yield and water use efficiency of tomato, SDI laterals could be placed at 10 cm depth below soil surface.

Effects of Drip Irrigation Patterns on Wheat Yield and Water Use Efficiency in Heilonggang Region

2013 ◽  
Vol 39 (9) ◽  
pp. 1687 ◽  
Author(s):  
Zi-Jin NIE ◽  
Yuan-Quan CHEN ◽  
Jian-Sheng ZHANG ◽  
Jiang-Tao SHI ◽  
Chao LI ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Drip Irrigation ◽  
Wheat Yield ◽  
Use Efficiency ◽  
Irrigation Patterns
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