Crop response functions integrating water, nitrogen, and salinity

Wang, J.; Baerenklau, Kenneth A.

doi:10.1016/j.agwat.2014.03.009

Cited by 20 publications

(11 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, under semi‐arid climates, plant growth can be limited by different abiotic factors acting simultaneously, such as nitrogen deficiency, drought and salinity. In such cases, plants respond to interaction and feedback mechanisms between these factors (Wang and Baerenklau ). Thus, manipulating a single factor usually is not the solution considering that plants respond primarily to the most yield‐limiting factor (Semiz et al.…”

Section: Discussionmentioning

confidence: 99%

Evapotranspiration as a Criterion to Estimate Nitrogen Requirement of Maize Under Salt Stress

Lacerda

Ferreira

Liu

et al. 2015

J Agronomy Crop Science

View full text Add to dashboard Cite

We tested the hypothesis that by reducing the application of N, based on the decrease in evapotranspiration (ET) expected due to increase in soil salinity, it is possible to reduce N loss without causing N deficiency or further yield loss in salt-stressed maize plants. We tested four levels of salinity of irrigation water (S1 = 0.5; S2 = 2.5; S3 = 5.0; and S4 = 7.5 dS m À1 ) and four N rates using outdoor soil columns with five replicates. The N rates were as follows: N1: N recommendation for maize (2.6 g per column); N2: 0.3 times the N recommendation (0.78 g per column); N3: reduction in N1 based on the decrease in ET caused by salinity; and N4: reduction in N2 based on the decrease in ET caused by salinity. The amounts of N for N3 and N4 were reduced (in relation to N1 and N2) by 7 %, 15 % and 30 % for 2.5, 5.0 and 7.5 dS m À1 , respectively. Salinity caused NO 3 À accumulation in the soil, plant growth inhibition and stomatal closure. The low rates of N (N2 and N4) did not meet the N demand of maize plants, especially for low levels of salinity (control and 2.5 dS m À1 ). On the other hand, based on the available growth data, physiological responses and nutritional status, one can conclude that plants under N1 and N3 had the same potential for final yield. For these N rates, reduction in N application according to ET (N3 rate) not only allowed plant growth and maize physiological responses, but also increased N-use efficiency and greatly reduced soil nitrate accumulation compared to N1 rate, at the same levels of salinity. We conclude that reduction in N application, based on reductions in ET, is a good strategy to reduce both the risk of ground water contamination by NO 3 À leaching and fertilization costs, without causing additional damage to plant development under salt stress.

show abstract

Section: Discussionmentioning

confidence: 99%

Evapotranspiration as a Criterion to Estimate Nitrogen Requirement of Maize Under Salt Stress

Lacerda

Ferreira

Liu

et al. 2015

J Agronomy Crop Science

View full text Add to dashboard Cite

show abstract

“…We adapt the GME approach suggested by Kaplan et al (2003), which is incorporated into a specific theoretical structure describing both crop production technology and nature's nitrate residual mechanism based on the multiple production relations model developed by Murty et al (2012). The model assumes a specific parametric structure of both technologies using an extensive soil science literature and the model suggested by Knapp and Schwabe (2008) and Wang and Baerenklau (2014). Using this complex modeling structure, we are able to convert the NPS pollution problem into a PS one approximating individual nitrate leaching levels among 257 greenhouse farms from the Ierapetra Valley in Southern Crete, Greece.…”

Section: Discussionmentioning

confidence: 99%

Nitrate leaching and efficiency measurement in intensive farming systems: A parametric by‐production technology approach

Tsagris

Tzouvelekas

2022

Agricultural Economics

View full text Add to dashboard Cite

This paper develops a novel empirical framework for estimating individual emission levels in a nonpoint source (NPS) pollution problem. For doing so, we build upon the sequential GME model suggested by Kaplan et al. using a specific theoretical structure describing both crop production technology and nature's residual generating mechanism in line with the multiple production relations model suggested by Murty et al. Our empirical model is fitted into a parametric stochastic framework and it is applied to a nitrogen leaching problem in a sample of 257 small-scale greenhouse farms in Crete, Greece during the 2005-2006 cropping period. Empirical results indicate a great dispersion of individual nitrate leaching levels, which are associated with low-and high-profit margins. Improvements in nitrate leaching and fertilizer application efficiency can decrease significantly individual leaching levels providing a more cost effective way to improve water quality in the area.

show abstract

“…As mentioned above, our approach for developing crop‐water production functions is based on a combination of the approaches found in Kan et al . [] and Wang and Baerenklau []. Kan et al .…”

Section: Methodsmentioning

confidence: 99%

“…[], estimate yield as a function of evapotranspiration, and evapotranspiration as a function of applied water, controlling for salinity. Wang and Baerenklau [], meanwhile, use HYDRUS‐1D to estimate relative yield (ratio of actual yield to potential yield) as a function of water and nitrogen uptake. We extend Wang and Baerenklau [] by accounting for evaporation and precipitation, and by using a modified version of HYDRUS‐1D that calculates instantaneous yield reduction by comparing water and nitrogen uptake throughout the growing season instead of only at the end.…”

Section: Methodsmentioning

confidence: 99%

Biofuel as an Integrated Farm Drainage Management crop: A bioeconomic analysis

Levers

Schwabe

2017

Water Resources Research

View full text Add to dashboard Cite

Irrigated agricultural lands in arid regions often suffer from soil salinization and lack of drainage, which affect environmental quality and productivity. Integrated Farm Drainage Management (IFDM) systems, where drainage water generated from higher‐valued crops grown on high quality soils are used to irrigate salt‐tolerant crops grown on marginal soils, is one possible strategy for managing salinity and drainage problems. If the IFDM crop were a biofuel crop, both environmental and private benefits may be generated; however, little is known about this possibility. As such, we develop a bioeconomic programming model of irrigated agricultural production to examine the role salt‐tolerant biofuel crops might play within an IFDM system. Our results, generated by optimizing profits over land, water, and crop choice decisions subject to resource constraints, suggest that based on the private profits alone, biofuel crops can be a competitive alternative to the common practices of land retirement and nonbiofuel crop production under both low to high drainage water salinity. Yet IFDM biofuel crop production generates 30–35% fewer GHG emissions than the other strategies. The private market competitiveness coupled with the public good benefits may justify policy changes encouraging the growth of IFDM biofuel crops in arid agricultural areas globally.

show abstract

Crop response functions integrating water, nitrogen, and salinity

Cited by 20 publications

References 36 publications

Evapotranspiration as a Criterion to Estimate Nitrogen Requirement of Maize Under Salt Stress

Evapotranspiration as a Criterion to Estimate Nitrogen Requirement of Maize Under Salt Stress

Nitrate leaching and efficiency measurement in intensive farming systems: A parametric by‐production technology approach

Biofuel as an Integrated Farm Drainage Management crop: A bioeconomic analysis

Contact Info

Product

Resources

About