Growth and yield of sugarcane irrigated with brackish water and leaching fractions

Abstract

The objective was to evaluate the growth and yield of sugarcane irrigated with brackish water and leaching fractions. A completely randomized experimental design was used, in a 5 x 2 factorial scheme, with four replicates. The treatments consisted of five irrigation water salinity levels (0.5, 2.0, 3.5, 5.0 and 6.5 dS m-1) and two leaching fractions (0 and 0.17), corresponding to 100 and 120% of the crop evapotranspiration. The irrigation management was performed daily. Irrigation water salinity levels were obtained by adding NaCl and CaCl2 to the public-supply water, in order to obtain a molar ratio between Na:Ca of 1:1. The following measurements were taken: height and stem diameter; number of tillers; number of leaves and leaf area with monthly frequency between 60 and 300 days after planting (DAP). It was concluded that irrigation water salinity negatively influenced the variables of growth and yield in the sugarcane, and the leaching fraction of 0.17 was capable of reducing the deleterious effects of the salts on the plants.

Evaluation of irrigation water salinity and leaching fraction on the water productivity for crops

“…The steady state was a reasonable approximation over sufficiently long time periods (e.g., more than one season), and they have relatively modest data requirements. Many studies have used them to evaluate the effects on plant growth and the yield response of the LF and irrigation water salinity in order to enhance plant growth [18][19][20][21][22][23] . Under a given irrigation water salinity, a suitable LF value can be used to increase relative yield and maximize the WP for irrigation water [24] , but the computational method was not verified.…”

Alluvial Soil Quality Indicators As Affected By Different Land-Uses. مؤشرات جودة التربة الطمييه تحت تأثير الاستخدامات المختلفة للأراضي.

“…Sugarcane plants have a salinity threshold of 1.7 dS m -1 and are therefore a crop of moderate sensitivity for soil salts according to Maas and Hoffmam (1977). Lira, et al, (2018), stated that irrigation with saline water negatively predisposed all sugarcane growth quality parameters: leaf area, stem diameter, stem height, number of tillers and number of leaves, more significantly leaf area and stem diameter. In addition, irrigation with saline water linearly declined sugarcane yield and dry weight.…”

“…Since soil aggregates are established, soil provides organized pores matrix, these pores influence the fate and movement of air, water and essential nutrients for plant growth, and soil organic carbon retention, as well as soil degradation (Wang et al 2016;Zhao et al 2017;Phocharoen, et al, 2018). Electrolytes separated into cations and anions in soil solution are one of the most important inner factors that affect soil structural stability via aggregation of soil particles and anchoring individual sand, silt and clay soil particles into stabilized aggregates (De Lira et al, 2018;Phocharoen, et al,2018;Singh et al, 2018). Sodium Na + had negative effects dissimilar to calcium Ca 2+ , magnesium Mg 2+ and potassium K + on soil penetrability by boosting clay dispersion, deforming soil structure, and ultimately decreasing soil hydraulic conductivity (Phocharoen, et al,2018;Singh et al, 2018).…”

Efficient irrigation management in sugarcane cultivation in saline soil

“…Salt stress causes alterations in the photosynthetic rate of sugarcane varieties, which may be associated with changes that also occur in the stomatal conductance (Simões et al, 2019). Under salinity, photosynthesis and cell growth of plants are directly affected due to the decrease in the carbon dioxide availability (Simões et al, 2018). Mustafa & Akhtar (2019) report that about 50% of the land will be salinized within the next 50 years if techniques to reduce and mitigate the adverse impact of soil salinity are not adopted.…”