Abstract
Soil salinization is a prevalent global environmental issue that significantly hampers crop growth and yield. However, there has been limited research on the impact of nitrogen fertilization and various management practices in alleviating saline-sodic stress in crops. In order to examine the impact of combined straw and nitrogen fertilizer application on the physiological and photosynthetic characteristics of rice in saline-sodic paddy fields, a three-year field experiment was conducted in Jilin Province, China. The experiment was conducted as a split-zone trial, where the main zone consisted of straw (S) and the secondary zone consisted of nitrogen fertilizer (N). Two levels of straw were 0 t ha−1 (B) and 7 t ha−1 (T). Four nitrogen treatments were applied: 0, 150, 250, and 350 kg ha−1, denoted as N0, N1, N2, and N3, respectively. The results show that the combination of straw and nitrogen fertilizer has been found to effectively reduce the Na+/K+ value, malondialdehyde content, and the relative electric leakage of rice leaves in saline-sodic soil. Furthermore, it increases leaf water potential, relative water content, and chlorophyll content, thereby promoting rice photosynthesis and improving rice yield. The rice yield exhibited the greatest positive effect when straw and nitrogen fertilizer were combined at a rate of 250 kg ha−1. The effectiveness of this combination improves over time. However, it is important to avoid excessive application of nitrogen fertilizer when using straw returning. This approach not only ensures stable rice yield in saline-sodic fields, but also has positive effects on the economic impact of fertilizer application and soil environment preservation.
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Claims 7
Claim · model-written summary
Combined straw and nitrogen reduced rice leaf Na+/K+, malondialdehyde, and electric leakage.
- Taxon
- rice
Oryza sativae0 - Treatment
- combination of straw and nitrogen fertilizere0
- Outcome
- Na+/K+ value, malondialdehyde content, and the relative electric leakage of rice leavese0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combination of straw and nitrogen fertilizer has been found to effectively reduce the Na+/K+ value, malondialdehyde content, and the relative electric leakage of rice leaves in saline-sodic soil”
Claim · model-written summary
Combined straw and nitrogen increased rice leaf water potential, relative water content, and chlorophyll content.
- Taxon
- riceOryza sativae0
- Treatment
- combination of straw and nitrogen fertilizere1
- Outcome
- leaf water potential, relative water content, and chlorophyll contente0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it increases leaf water potential, relative water content, and chlorophyll content, thereby promoting rice photosynthesis and improving rice yield”
e1“the combination of straw and nitrogen fertilizer”
Claim · model-written summary
Combined straw and nitrogen promoted rice photosynthesis.
- Taxon
- riceOryza sativae0
- Treatment
- combination of straw and nitrogen fertilizere1
- Outcome
- rice photosynthesise0
- Direction
- promotinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thereby promoting rice photosynthesis and improving rice yield”
e1“the combination of straw and nitrogen fertilizer”
Claim · model-written summary
Combined straw and nitrogen improved rice yield.
- Taxon
- riceOryza sativae0
- Treatment
- combination of straw and nitrogen fertilizere1
- Outcome
- rice yielde0
- Direction
- improvinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thereby promoting rice photosynthesis and improving rice yield”
e1“the combination of straw and nitrogen fertilizer”
Claim · model-written summary
Rice yield had the greatest positive response with straw and 250 kg ha−1 nitrogen fertilizer.
- Taxon
- riceOryza sativae0
- Treatment
- straw and nitrogen fertilizer were combined at a rate of 250 kg ha−1e0
- Outcome
- rice yielde0
- Direction
- greatest positive effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rice yield exhibited the greatest positive effect when straw and nitrogen fertilizer were combined at a rate of 250 kg ha−1.”
Claim · model-written summary
The effect of combined straw and nitrogen improved over time.
- Taxon
- riceOryza sativae1
- Outcome
- effectiveness of this combinatione0
- Direction
- improvese0
- Qualifier
- over timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effectiveness of this combination improves over time.”
e1“The rice yield exhibited the greatest positive effect when straw and nitrogen fertilizer were combined at a rate of 250 kg ha−1.”
Claim · model-written summary
The authors advise against excessive nitrogen fertilizer when returning straw.
- Taxon
- riceOryza sativae1
- Outcome
- avoid excessive application of nitrogen fertilizer when using straw returninge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is important to avoid excessive application of nitrogen fertilizer when using straw returning”
e1“rice yield in saline-sodic fields”
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