Untitled

Dian

et al. 2013

AMR

As an essential macroelement for all living cells, phosphorus plays a significant role in agricultural production systems. To better guide the establishment of the biofuel production systems of hybrid pennisetum, a popular energy plant with important potential in saline land, the effects of nutrient phosphorus on the growth, photosynthesis and ion homeostasis of hybrid pennisetum under salt treatment were examined with greenhouse pot experiments. Plant seedlings subjected to phosphorus deficiency (0.1 mmol·L-1P and 0.2 mmol·L-1P) increased in ratio of root to shoot and decreased in biomass. On the other hand, salinity inhibited the growth of hybrid pennisetum, but the effects of salinity on energy plants (Pennisetum americanum×P. Purpureum) were influenced by the concentration of nutrient phosphorus. Salinity was more injurious to hybrid pennisetum seedlings in combination with a lower concentration of phosphorus (0.1 mmol·L-1P, 0.2 mmol·L-1P and 0.6 mmol·L-1P) than it was with a higher concentration of phosphorus (1.0 mmol·L-1P) (that gave optimum yields in the absence of salinity). In addition, no significant differences were observed between 1.0 mmol·L-1P and 1.4 mmol·L-1P levels at either NaCl level, indicating that 1.0 mmol·L-1P was enough for the enhancement of both growth and tolerance to NaCl in hybrid pennisetum.

Section: Discussionsupporting

confidence: 39%

Effects of Phosphorus Nutrition on Growth, Photosynthesis, and Ion Accumulation of Energy Plant Hybrid Pennisetum Seedlings under Salinity

Dian

et al. 2013

AMR

“…Our results confirm the previous findings of Belouchrani et al [37] who reported that increased P rate stabilized the plant height in saline soil. In a similar study, Tang et al [65] found that Maize biomass improved significantly (by twice) when the plants were subjected to a high rate of P application under salinity compared to a low rate of P. P application under saline conditions and has positive effects on shoot and root biomass, root length, P concentration, and chlorophyll content in green beans [35,66]. Phosphorus reduces the harmful effects of salt by increasing the fresh weight of roots and the shoot lengths of barley [30].…”

Section: Effect Of Phosphorus On Plant Growth and Yieldmentioning

confidence: 93%

Phosphorus Fertilization Enhances Productivity of Forage Corn (Zea mays L.) Irrigated with Saline Water

Bouras

Bouaziz

Choukr‐Allah

et al. 2021

Plants

Salinity is a major problem affecting crop production in many regions in the world including Morocco. Agricultural practices such as fertilization could be useful to overcome this problem and improve crop productivity. The objective of our study was to evaluate the combined effect of phosphorus fertilization and irrigation water salinity on growth, yield, and stomatal conductance of forage corn (Zea mays L.) cv. “Sy sincerro”. Field experiments were carried out for two years testing four levels of irrigation water salinity (ECw = 0.7; 2, 4, and 6 dS·m−1) and three rates of phosphorus (105, 126, and 150 kg P2O5·ha−1) fertilization conducted in a split-plot design with three replications. The obtained results show that irrigation water salinity had a negative effect on all monitored parameters. For instance, the dry matter yield reduced by an average of 19.3 and 25.1% compared to the control under saline irrigation with an EC value equal to 4 and 6 dS·m−1, respectively. The finding also showed that phosphorus applications tend to increase root weight, root length, stem length, leaf stomatal conductance, grain yield and dry matter yield under salinity conditions. For example, the addition of phosphorus with a rate of 126 and 150 kg P2O5·ha−1 respectively improved dry matter yield by an average of 4 and 9% under low salinity level (ECw = 2 dS·m−1), by 4 and 15% under medium salinity (4 dS·m−1), and by 6 and 8% under a high salinity level (6 dS·m−1). Our finding suggests that supplementary P application could be one of the best practices to reduce the adverse effects of high salinity on growth and development of forage corn.

“…Overall, applying phosphorus fertilizer at all salinity levels improved both above-and underground plant parts. Previous studies have shown that higher phosphorus rates can mitigate the decline in plant height in saline soil [52,53], with positive impacts on shoot and root biomass, length, phosphorus concentration, and chlorophyll content in green beans, as well as increasing root length and weight in maize and sugar beet under saline conditions .…”

Section: Salinity × (Organic Matter-p Supply) Interaction Effects On ...mentioning

confidence: 98%

Unveiling the Synergistic Effects of Phosphorus Fertilization and Organic Amendments on Red Pepper Growth, Productivity and Physio-Biochemical Response under Saline Water Irrigation and Climate-Arid Stresses

Bouras,

Devkota,

Mamassi

et al. 2024

Plants

In regions facing water scarcity and soil salinity, mitigating these abiotic stresses is paramount for sustaining crop production. This study aimed to unravel the synergistic effects of organic matter and phosphorus management in reducing the adverse effect of saline water for irrigation on red pepper (Capsicum annuum L.) production, fruit quality, plant physiology, and stress tolerance indicators. The study was carried out in the arid Tadla region of Morocco and involved two key experiments: (i) a field experiment during the 2019 growing season, where red pepper plants were subjected to varying phosphorus fertilizer rates (120, 140, and 170 kg of P2O5.ha−1) and saline water irrigation levels (0.7; 1.5; 3; and 5 dS.m−1); and (ii) a controlled pot experiment in 2021 for examining the interaction of saline water irrigation levels (EC values of 0.7, 2, 5, and 9 dS.m−1), phosphorus rates (30, 36, and 42 kg of P2O5.ha−1), and the amount of organic matter (4, 8, 12, and 16 t.ha−1). The field study highlighted that saline irrigation significantly affected red pepper yields and fruit size, although phosphorus fertilization helped enhance productivity. Additionally, biochemical markers of stress tolerance, such as proline and glycine betaine, along with stomatal conductance, were impacted by increasing salinity levels. The pot experiment showed that combining organic amendments and phosphorus improved soil properties and stimulated red pepper growth and root weight across all salinity levels. The integration of phosphorus fertilization and organic amendments proved instrumental for counteracting salinity-induced constraints on red pepper growth and yield. Nonetheless, caution is necessary as high salinity can still negatively impact red pepper productivity, necessitating the establishment of an irrigation water salinity threshold, set at 5 dS.m−1.