Abstract
Poor management is the main reason for high N losses and reduced yield in rice production. Improved crop management in northeastern China is becoming increasingly important due to economic pressures in southern and central China along with rising temperatures in the Northeast, which have led to a major shift in rice ( Oryza sativa L.) production to this region. Here, we examine the opportunities for improving the yield and nitrogen use efficiency (NUE) of irrigated rice in northeastern China by optimizing nutrients and increasing the transplanting density. In 2009 to 2011, field experiments were conducted to compare optimized nutrient management (ONM) and optimized crop management treatments (OCM) with the farmers’ crop management (FCM) and no N treatment (control). Compared with the FCM, the ONM and OCM treatments significantly increased average grain yield by respective averages of 9 and 17%. These yield gains resulted from a combination of increases in grains per panicle and panicles per unit area. Compared with the FCM treatment, agronomic efficiency (AE N ), recovery efficiency of applied nitrogen (RE N ) and partial factor productivity of applied nitrogen (PFP N ) were enhanced by an average of 120, 116, and 67% across the ONM and OCM treatments in the 3‐yr study period, respectively. It is clear that high yields combined with high N use efficiency are possible in northeastern China by appropriately increasing rice transplanting density and optimizing nutrient management.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Optimized nutrient management increased average rice grain yield by 9% relative to farmer management.
- Taxon
- rice
Oryza sativat0 - Treatment
- ONMe0
- Outcome
- average grain yielde0
- Direction
- increasede0
- Value
- 9e0
- Comparator
- FCMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the FCM, the ONM and OCM treatments significantly increased average grain yield by respective averages of 9 and 17%”
t0“rice”
Claim · model-written summary
Optimized crop management increased average rice grain yield by 17% relative to farmer management.
- Taxon
- riceOryza sativat0
- Treatment
- OCMe0
- Outcome
- average grain yielde0
- Direction
- increasede0
- Value
- 17%e0
- Comparator
- FCMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the FCM, the ONM and OCM treatments significantly increased average grain yield by respective averages of 9 and 17%”
t0“rice”
Claim · model-written summary
Yield gains resulted from more grains per panicle and panicles per unit area.
- Taxon
- riceOryza sativat0
- Outcome
- grains per panicle and panicles per unit areae0
- Direction
- increasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These yield gains resulted from a combination of increases in grains per panicle and panicles per unit area”
t0“rice”
Claim · model-written summary
ONM and OCM enhanced agronomic N efficiency by an average 120% against FCM.
- Taxon
- riceOryza sativat0
- Treatment
- ONM and OCM treatmentse0
- Outcome
- agronomic efficiency (AE N )e0
- Direction
- enhancede0
- Value
- 120e0
- Comparator
- FCM treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the FCM treatment, agronomic efficiency (AE N ), recovery efficiency of applied nitrogen (RE N ) and partial factor productivity of applied nitrogen (PFP N ) were enhanced by an average of 120, 116, and 67% across the ONM and OCM treatments”
t0“rice”
Claim · model-written summary
ONM and OCM enhanced N recovery efficiency by an average 116% against FCM.
- Taxon
- riceOryza sativat0
- Treatment
- ONM and OCM treatmentse0
- Outcome
- recovery efficiency of applied nitrogen (RE N )e0
- Direction
- enhancede0
- Value
- 116e0
- Comparator
- FCM treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the FCM treatment, agronomic efficiency (AE N ), recovery efficiency of applied nitrogen (RE N ) and partial factor productivity of applied nitrogen (PFP N ) were enhanced by an average of 120, 116, and 67% across the ONM and OCM treatments”
t0“rice”
Claim · model-written summary
ONM and OCM enhanced partial factor productivity of applied N by an average 67% against FCM.
- Taxon
- riceOryza sativat0
- Treatment
- ONM and OCM treatmentse0
- Outcome
- partial factor productivity of applied nitrogen (PFP N )e0
- Direction
- enhancede0
- Value
- 67%e0
- Comparator
- FCM treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the FCM treatment, agronomic efficiency (AE N ), recovery efficiency of applied nitrogen (RE N ) and partial factor productivity of applied nitrogen (PFP N ) were enhanced by an average of 120, 116, and 67% across the ONM and OCM treatments”
t0“rice”
The same questions in other papers
fertilization · nutrient: efficiency · Oryza sativa (rice)Positive and negative results
201 papers in the same direction as this paper · 12 in the opposite direction · 6 reporting no difference from an alternative
- positive
- no effect
- no effect
216 papers more in this group
See all 220 papers →fertilization · yield · Oryza sativa (rice)Positive and negative results
3,182 papers in the same direction as this paper · 207 in the opposite direction · 65 reporting no difference from an alternative
- no effect
- no effect
- positive
3,451 papers more in this group
See all 3,455 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.