Abstract
Field experiment was conducted to test the effect of saline water 2 and7 dSm-1 potassium fertilizer rate 150,300 and 450 kg/donum on nitrogen fixation in Pisum sativum L. nodules. The experiment included anatomy study .Results water salinity ( 2,7 dSm-1) as a main plot and fertilizer rates as a sub plot. Results indicated that irrigation with saline water 7 dSm-¹ caused a significant decrease in N contents especially in the lower parts of the plants. The percentage of the N decreased in lower leaves to (0.01%) under 7dSm-¹ and 300 kg/donum fertilizer; however the percentage increased in the upper leaves to (2.80%) under with 2dSm-¹of irrigation water and 300 kg/ donum fertilizer rate. Fresh weight decreased to 6.26g under 7 dSm-¹ and 450 kg/donum fertilizer rate, but irrigated with 2 dSm-¹ and 300 kg/donum fertilizer rate increased it to 18.87g. The nodules number , fresh and dry weight decreased to( 114 nodule/plant ,2.18 and 1.70 g/plant ) with 7 dSm-¹ salinity water and 150 kg/donum fertilizer, respectively , the results showed that irrigation with 2 dSm-¹ saline water and 300kg/ donum fertilizer increased them to ( 167.6 nodule/plant,5.43 and 2.20 g/plant )respectively. Increasing levels of irrigation water from 2 to 7 dSm-¹ salinity, caused increased vessels thickness in both leaves and root; this is because the salt accumulated on cell wall .whereas cortex cell wall was thicker in root for same reason . Thus of nitrogen fixing symbiosis in pea was more determined with anatomy change in root tissues which caused decreasing in nodules number fresh and dry weight. Accordingly, conclusion could be made that potassium may reduce the inhibitory effect for nitrogen fixation in saline water irrigation condition.
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Claims 5
Claim · model-written summary
High salinity significantly lowered plant nitrogen content, especially in lower parts.
- Taxon
- Pisum sativum L.
Lathyrus oleraceust0 - Organ / stage
- lower parts of the plantse0
- Treatment
- saline water 7 dSm-¹e0
- Outcome
- N contentse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum L.”
e0“irrigation with saline water 7 dSm-¹ caused a significant decrease in N contents especially in the lower parts of the plants”
Claim · model-written summary
Lower leaf nitrogen was 0.01% at high salinity and 300 kg/donum fertilizer.
- Taxon
- Pisum sativum L.Lathyrus oleraceust0
- Organ / stage
- lower leavese0
- Treatment
- 7dSm-¹ and 300 kg/donum fertilizere0
- Outcome
- percentage of the Ne0
- Direction
- decreasede0
- Value
- 0.01%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum L.”
e0“The percentage of the N decreased in lower leaves to (0.01%) under 7dSm-¹ and 300 kg/donum fertilizer”
Claim · model-written summary
Upper leaf nitrogen rose to 2.80% at lower salinity and 300 kg/donum fertilizer.
- Taxon
- Pisum sativum L.Lathyrus oleraceust0
- Organ / stage
- upper leavese0
- Treatment
- 2dSm-¹of irrigation water and 300 kg/ donum fertilizer ratee0
- Outcome
- percentagee0
- Direction
- increasede0
- Value
- 2.80%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum L.”
e0“percentage increased in the upper leaves to (2.80%) under with 2dSm-¹of irrigation water and 300 kg/ donum fertilizer rate”
Claim · model-written summary
Fresh weight decreased to 6.26g at high salinity and 450 kg/donum fertilizer.
- Taxon
- Pisum sativum L.Lathyrus oleraceust0
- Treatment
- 7 dSm-¹ and 450 kg/donum fertilizer ratee0
- Outcome
- Fresh weighte0
- Direction
- decreasede0
- Value
- 6.26ge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum L.”
e0“Fresh weight decreased to 6.26g under 7 dSm-¹ and 450 kg/donum fertilizer rate”
Claim · model-written summary
Fresh weight increased to 18.87g at lower salinity and 300 kg/donum fertilizer.
- Taxon
- Pisum sativum L.Lathyrus oleraceust0
- Treatment
- 2 dSm-¹ and 300 kg/donum fertilizer ratee0
- Outcome
- Fresh weighte1
- Direction
- increasede0
- Value
- 18.87ge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum L.”
e0“irrigated with 2 dSm-¹ and 300 kg/donum fertilizer rate increased it to 18.87g”
e1“Fresh weight decreased to 6.26g”
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