Abstract
Sugar beet is a characteristic cash crop in Inner Mongolia, and water and fertilizer is an important management measure in sugar beet planting. The interaction between water and nitrogen is of practical significance in regulating the growth of sugar beet. The coordinated relationship between water and fertilizer can achieve the purpose of water saving, fertilizer saving, cost saving and efficiency increasing. The cultivation method of drip irrigation under plastic mulch was adopted in this study. The effects of water nitrogen supply on water metabolism and photosynthetic performance of sugar beet were studied through two years of field experiments in order to provide theoretical basis for improving the utilization efficiency of water and fertilizer and rational fertilization and irrigation. The results showed that the water nitrogen supply level and its proportion had influence with the water potential, Transpiration rate (Tr), Photosynthetic rate (Pn) and stomatal Conductance (Cond) of sugar beet leaves. And they were significantly positively correlated with the yield of sugar beet. When the water potential of sugar beet leaves was −0.38 ∼ −0.23 MPa in the period of leaf fast growth, root and sugar growth, and −0.45 ∼ −0.38 MPa in the period of sugar accumulation, the yield and sugar content were the highest. Under the coupling condition of water and nitrogen, the irrigation amount of sugar beet was 1350 ∼ 1427 m3·ha−1, and the nitrogen application amount was 150 ∼ 179.22 kg·ha−1. Sugar beet has the highest utilization rate of light energy and yield and sugar content.
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Claims 7
Claim · model-written summary
Water and nitrogen supply levels and proportions influenced leaf water potential, transpiration, photosynthesis and stomatal conductance.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarise0 - Treatment
- water nitrogen supply level and its proportione0
- Outcome
- water potential, Transpiration rate (Tr), Photosynthetic rate (Pn) and stomatal Conductance (Cond)e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that the water nitrogen supply level and its proportion had influence with the water potential, Transpiration rate (Tr), Photosynthetic rate (Pn) and stomatal Conductance (Cond) of sugar beet leaves.”
Claim · model-written summary
The listed leaf physiological traits were significantly positively correlated with sugar beet yield.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Organ / stage
- leavese0
- Outcome
- yield of sugar beete0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water potential, Transpiration rate (Tr), Photosynthetic rate (Pn) and stomatal Conductance (Cond) of sugar beet leaves. And they were significantly positively correlated with the yield of sugar beet.”
Claim · model-written summary
Yield was highest at the stated leaf water potentials during fast leaf growth, root and sugar growth, and sugar accumulation.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Organ / stage
- leavese0
- Outcome
- yielde0
- Direction
- higheste0
- Value
- −0.38 ∼ −0.23 MPae0
- Qualifier
- −0.45 ∼ −0.38 MPa in the period of sugar accumulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the water potential of sugar beet leaves was −0.38 ∼ −0.23 MPa in the period of leaf fast growth, root and sugar growth, and −0.45 ∼ −0.38 MPa in the period of sugar accumulation, the yield and sugar content were the highest.”
Claim · model-written summary
Sugar content was highest at the stated leaf water potentials during the growth and accumulation periods.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Organ / stage
- leavese0
- Outcome
- sugar contente0
- Direction
- higheste0
- Value
- −0.45 ∼ −0.38 MPae0
- Qualifier
- −0.38 ∼ −0.23 MPa in the period of leaf fast growth, root and sugar growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the water potential of sugar beet leaves was −0.38 ∼ −0.23 MPa in the period of leaf fast growth, root and sugar growth, and −0.45 ∼ −0.38 MPa in the period of sugar accumulation, the yield and sugar content were the highest.”
Claim · model-written summary
Under coupled water and nitrogen supply at the reported application rates, sugar beet had its highest light energy use.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- irrigation amount of sugar beet was 1350 ∼ 1427 m3·ha−1, and the nitrogen application amount was 150 ∼ 179.22 kg·ha−1e0
- Outcome
- utilization rate of light energye0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the coupling condition of water and nitrogen, the irrigation amount of sugar beet was 1350 ∼ 1427 m3·ha−1, and the nitrogen application amount was 150 ∼ 179.22 kg·ha−1. Sugar beet has the highest utilization rate of light energy and yield and sugar content.”
Claim · model-written summary
Under coupled water and nitrogen supply at the reported rates, sugar beet yield was highest.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- irrigation amount of sugar beet was 1350 ∼ 1427 m3·ha−1, and the nitrogen application amount was 150 ∼ 179.22 kg·ha−1e0
- Outcome
- yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the coupling condition of water and nitrogen, the irrigation amount of sugar beet was 1350 ∼ 1427 m3·ha−1, and the nitrogen application amount was 150 ∼ 179.22 kg·ha−1. Sugar beet has the highest utilization rate of light energy and yield and sugar content.”
Claim · model-written summary
Under coupled water and nitrogen supply at the reported rates, sugar beet sugar content was highest.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- irrigation amount of sugar beet was 1350 ∼ 1427 m3·ha−1, and the nitrogen application amount was 150 ∼ 179.22 kg·ha−1e0
- Outcome
- sugar contente0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the coupling condition of water and nitrogen, the irrigation amount of sugar beet was 1350 ∼ 1427 m3·ha−1, and the nitrogen application amount was 150 ∼ 179.22 kg·ha−1. Sugar beet has the highest utilization rate of light energy and yield and sugar content.”
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