Abstract
The present study was carried out during the summer season of 2017 to ameliorate the effect of water stress on growth parameters of sorghum plant, macronutrient uptake, water use efficiency and dry matter by addition of potassium silicate and salicylic acid as foliar applications. Two pot experiments were conducted at the farm of the Faculty of Agriculture, Al-Azhar University, Nasr city, Cairo, Egypt. The two factorial experiments were arranged in a randomized complete block design with 9 treatments and three replicates per treatment in each experiment. In the first experiment, foliar spray of potassium silicate (1 and 2 %) and untreated as the control were applied under 100, 75 and 50 % of field capacity (FC). In the second experiment, foliar application of salicylic acid (100 and 200 ppm) and untreated as the control were applied under 100, 75 and 50% of field capacity (FC). Potassium silicate and salicylic acid were sprayed on the vegetative growth of sorghum plants four times every two weeks, after ten days of planting during the period of the experiment (60 days). The results showed that there were significant increases in the growth parameters, i.e. plant height, stem diameter, fresh and dry weight of sorghum plants as a result of foliar application by potassium silicate and salicylic acid under water stress compared with the control. It is clear that, potassium silicate was more effective than salicylic acid in improving all growth parameters. Decreasing water availability generally results in reduced the total nutrient concentration in sorghum plants, the most affected was P and K under all levels of moisture content. But nitrogen content decreased at 75 % FC, and increased at 50% FC. Also, NPK uptake significantly increased with increasing foliar applications of potassium silicate and salicylic acid under all levels of moisture content compared with the control. The data clearly reveal that foliar applications of potassium silicate had the highest significant water use efficiency compared to the control. Also, salicylic acid gave a positive effect on water use efficiency.
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Claims 10
Claim · model-written summary
Potassium silicate increased four growth measures under water stress.
- Treatment
- potassium silicatee0
- Outcome
- plant height, stem diameter, fresh and dry weighte0
- Direction
- increasese0
- Comparator
- the controle0
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant increases in the growth parameters, i.e. plant height, stem diameter, fresh and dry weight of sorghum plants as a result of foliar application by potassium silicate and salicylic acid under water stress compared with the control.”
Claim · model-written summary
Salicylic acid increased four growth measures under water stress.
- Treatment
- salicylic acide0
- Outcome
- plant height, stem diameter, fresh and dry weighte0
- Direction
- increasese0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant increases in the growth parameters, i.e. plant height, stem diameter, fresh and dry weight of sorghum plants as a result of foliar application by potassium silicate and salicylic acid under water stress compared with the control.”
Claim · model-written summary
Potassium silicate improved growth more than salicylic acid.
- Treatment
- potassium silicatee0
- Outcome
- all growth parameterse0
- Direction
- more effectivee0
- Comparator
- salicylic acide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potassium silicate was more effective than salicylic acid in improving all growth parameters.”
t0“SORGHUM”
Claim · model-written summary
Reduced water availability lowered total nutrient concentration, especially P and K.
- Treatment
- Decreasing water availabilitye0
- Outcome
- total nutrient concentratione0
- Direction
- reducede0
- Qualifier
- the most affected was P and Ke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Decreasing water availability generally results in reduced the total nutrient concentration in sorghum plants, the most affected was P and K under all levels of moisture content.”
Claim · model-written summary
Nitrogen content decreased at 75% field capacity.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen content decreased at 75 % FC, and increased at 50% FC.”
t0“SORGHUM”
Claim · model-written summary
Nitrogen content increased at 50% field capacity.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen content decreased at 75 % FC, and increased at 50% FC.”
t0“SORGHUM”
Claim · model-written summary
Potassium silicate increased NPK uptake under all moisture levels.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NPK uptake significantly increased with increasing foliar applications of potassium silicate and salicylic acid under all levels of moisture content compared with the control.”
t0“SORGHUM”
Claim · model-written summary
Salicylic acid increased NPK uptake under all moisture levels.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NPK uptake significantly increased with increasing foliar applications of potassium silicate and salicylic acid under all levels of moisture content compared with the control.”
t0“SORGHUM”
Claim · model-written summary
Potassium silicate gave the highest water use efficiency relative to control.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar applications of potassium silicate had the highest significant water use efficiency compared to the control.”
t0“SORGHUM”
Claim · model-written summary
Salicylic acid improved water use efficiency.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salicylic acid gave a positive effect on water use efficiency.”
t0“SORGHUM”
The same questions in other papers
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See all 14 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.