Abstract
Irrigation is one of the most important measures to regulate plant metabolism in winter wheat(Triticum aestivum L.).However,unsuitable irrigation will cause the decline of nitrogen use efficiency and grain yield.To determine the effects of irrigation amount and stage on nitrogen accumulation,distribution,translocation and soil NO3--N content under the condition of high yield at the level of 9000 kg per hectare,the field experiment was carried out on high fertility soil with organic matter 15.20 g/kg,alkali-hydrolysable N 77.13 mg/kg, available P 29.70 mg/kg,and available K 121.58 mg/kg in Shiwang village,Yanzhou city,Shandong province,China,using the wheat cultivar Jimai 22 which has high yield and medium gluten potential.Five treatments were set with no irrigation (W0),irrigated before sowing(W1),irrigated before sowing and at jointing stage,respectively(W2),irrigated before sowing,at jointing and anthesis stages,respectively(W3),irrigated before sowing and at anthesis stage,respectively(W4).The irrigation amount each time was 60 mm.There were three replicates for each treatment.The plot area was 2 m×6 m and a 1 m wide protective belt was left between every two adjacent experimental plots.The basic seedling number was 180 plant/m2.The results indicated that,the nitrogen accumulation amount in plant and grain and the nitrogen translocation amount(nitrogen accumulation in vegetative organs at anthesis stage—nitrogen accumulation in vegetative organs at maturity,NTA) from vegetative organs to grain after anthesis in treatments which irrigation were supplied were significantly higher than those of treatment W0.With the increasing of irrigation amount,the nitrogen accumulation amount of wheat plant,NTA and nitrogen translocation efficiency(NTA/nitrogen accumulation in vegetative organs at anthesis stage,TE) from vegetative organs to grain after anthesis were increased at first then decreased,and those of treatment W2 were the highest.The soil NO-3-N content in 0200 cm soil layer decreased first,increased then,and decreased again as wheat growth process progress,and reached its lowest content at jointing stage.At maturity stage,the soil NO-3-N content in 0-40 cm soil layer of treatment W0 was significantly higher than that of treatments which irrigation were supplied.With the increasing of irrigation amount,the soil NO-3-N content in 100160 cm soil layer was increased,that of treatment W2 was significantly lower than treatment W3 and W4,and there were no significant differences in 160200 cm soil layer among these treatments.With the increasing of irrigation amount,nitrogen uptake efficiency,nitrogen harvest index and nitrogen fertilizer productive efficiency were increased at first then decreased,and those of treatment W2 were the highest.But nitrogen use efficiency was gradually decreased,and that of treatment W0 was the highest while there was no significant difference among treatment W2,W3 and W4.Based on a comprehensive consideration of nitrogen use efficiency,grain yield and soil NO-3-N content,the irrigation amount and stage recommended under the condition of this research was the treatment W2 which irrigated before sowing and at jointing stage respectively,the irrigation amount each time was 60 mm.
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Claims 11
Claim · model-written summary
Irrigated treatments had significantly higher plant and grain nitrogen accumulation and nitrogen translocation than W0.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- irrigatione2
- Outcome
- nitrogen accumulation amount in plant and graine1
- Direction
- highere2
- Comparator
- treatment W0e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-yield wheat”
e1“the nitrogen accumulation amount in plant and grain and the nitrogen translocation amount”
e2“in treatments which irrigation were supplied were significantly higher than those of treatment W0”
Claim · model-written summary
Plant nitrogen accumulation and nitrogen translocation efficiency rose then fell with increasing irrigation amount, highest at W2.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- irrigation amounte3
- Outcome
- nitrogen accumulation amount of wheat plante3
- Direction
- increased at first then decreasede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-yield wheat”
e3“With the increasing of irrigation amount,the nitrogen accumulation amount of wheat plant,NTA and nitrogen translocation efficiency(NTA/nitrogen accumulation in vegetative organs at anthesis stage,TE) from vegetative organs to grain after anthesis were increased at first then decreased,and those of treatment W2 were the highest”
Claim · model-written summary
Soil NO3-N content in the 0-200 cm layer decreased, then increased, then decreased again over the growth period, lowest at jointing.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- jointing stagee4
- Outcome
- soil NO-3-N content in 0200 cm soil layere4
- Direction
- decreased first,increased then,and decreased againe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-yield wheat”
e4“The soil NO-3-N content in 0200 cm soil layer decreased first,increased then,and decreased again as wheat growth process progress,and reached its lowest content at jointing stage”
Claim · model-written summary
At maturity, soil NO3-N in 0-40 cm under W0 was significantly higher than under irrigated treatments.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- maturity stagee5
- Treatment
- treatment W0e5
- Outcome
- soil NO-3-N content in 0-40 cm soil layere5
- Direction
- highere5
- Comparator
- treatments which irrigation were suppliede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-yield wheat”
e5“At maturity stage,the soil NO-3-N content in 0-40 cm soil layer of treatment W0 was significantly higher than that of treatments which irrigation were supplied”
Claim · model-written summary
Soil NO3-N in the 100-160 cm layer increased with increasing irrigation amount.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- irrigation amounte6
- Outcome
- soil NO-3-N content in 100160 cm soil layere6
- Direction
- increasede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-yield wheat”
e6“With the increasing of irrigation amount,the soil NO-3-N content in 100160 cm soil layer was increased”
Claim · model-written summary
Soil NO3-N in the 100-160 cm layer under W2 was significantly lower than under W3 and W4.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- treatment W2e1
- Outcome
- soil NO-3-N content in 100160 cm soil layere7
- Direction
- lowere1
- Comparator
- treatment W3 and W4e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-yield wheat”
e7“the soil NO-3-N content in 100160 cm soil layer”
e1“that of treatment W2 was significantly lower than treatment W3 and W4”
Claim · model-written summary
No significant differences in soil NO3-N in the 160-200 cm layer among treatments.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- significant differences in 160200 cm soil layere0
- Qualifier
- among these treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-yield wheat”
e0“there were no significant differences in 160200 cm soil layer among these treatments”
Claim · model-written summary
Nitrogen uptake efficiency, nitrogen harvest index and nitrogen fertilizer productive efficiency rose then fell with increasing irrigation amount, highest at W2.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- irrigation amounte0
- Outcome
- nitrogen uptake efficiencye0
- Direction
- increased at first then decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-yield wheat”
e0“With the increasing of irrigation amount,nitrogen uptake efficiency,nitrogen harvest index and nitrogen fertilizer productive efficiency were increased at first then decreased,and those of treatment W2 were the highest”
Claim · model-written summary
Nitrogen use efficiency decreased gradually with increasing irrigation, and was highest under W0.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- treatment W0e0
- Outcome
- nitrogen use efficiencye0
- Direction
- gradually decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-yield wheat”
e0“But nitrogen use efficiency was gradually decreased,and that of treatment W0 was the highest”
Claim · model-written summary
Nitrogen use efficiency under W0 was highest, with no significant difference among W2, W3 and W4.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- treatment W0e0
- Outcome
- nitrogen use efficiencye0
- Direction
- higheste0
- Comparator
- treatment W2,W3 and W4e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-yield wheat”
e0“But nitrogen use efficiency was gradually decreased,and that of treatment W0 was the highest”
e1“while there was no significant difference among treatment W2,W3 and W4”
Claim · model-written summary
Irrigation before sowing and at jointing, 60 mm each time, is recommended for this high-yield wheat condition.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- irrigated before sowing and at jointing stagee0
- Outcome
- irrigation amount and stage recommendede0
- Value
- 60 mme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“high-yield wheat”
e0“the irrigation amount and stage recommended under the condition of this research was the treatment W2 which irrigated before sowing and at jointing stage respectively”
e1“the irrigation amount each time was 60 mm”
The same questions in other papers
irrigation · nutrient: content · Triticum aestivum (wheat)Positive and negative results
73 papers in the same direction as this paper · 29 in the opposite direction
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See all 103 papers →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.