Abstract
Yield gap exists because the current attained actual grain yield cannot yet achieve the estimated yield potential. Chinese high yield maize belt has a wide span from east to west which results in different solar radiations between different regions and thus different grain yields. We used multi-site experimental data, surveyed farmer yield data, the highest recorded yield data in the literatures, and simulations with Hybrid-Maize Model to assess the yield gap and tried to reduce the yield gap by matching the solar radiation and plant density. The maize belt was divided into five regions from east to west according to distribution of accumulated solar radiation. The results showed that there were more than 5.8 Mg ha–1 yield gaps between surveyed farmer yield and the yield potential in different regions of China from east to west, which just achieved less than 65% of the yield potential. By analyzing the multi-site density experimental data, we found that the accumulated solar radiation was significantly correlated to optimum plant density which is the density with the highest yield in the multi-site density experiment (y=0.09895×–32.49, P<0.01), according to which the optimum plant densities in different regions from east to west were calculated. It showed that the optimum plant density could be increased by 60.0, 55.2, 47.3, 84.8, and 59.6% compared to the actual density, the grain yield could be increased by 20.2, 18.3, 10.9, 18.1, and 15.3% through increasing plant density, which could reduce the yield gaps of 33.7, 23.0, 13.4, 17.3, and 10.4% in R (region)-1, R-2, R-3, R-4, and R-5, respectively. This study indicates that matching maize plant density and solar radiation is an effective approach to reduce yield gaps in different regions of China.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. 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
Farmer maize yield was over 5.8 Mg ha–1 below potential and below 65% of potential across regions.
- Outcome
- yield gapse0
- Value
- 5.8 Mg ha–1e0
- Qualifier
- less than 65% of the yield potentiale0
- Comparator
- yield potentiale0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more than 5.8 Mg ha–1 yield gaps between surveyed farmer yield and the yield potential in different regions of China from east to west, which just achieved less than 65% of the yield potential”
e1“high yield maize belt”
Claim · model-written summary
Accumulated solar radiation correlated significantly with optimum maize plant density.
- Outcome
- optimum plant densitye0
- Qualifier
- y=0.09895×–32.49, P<0.01e0
- Setting
- multi-site density experimente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the accumulated solar radiation was significantly correlated to optimum plant density which is the density with the highest yield in the multi-site density experiment (y=0.09895×–32.49, P<0.01)”
e1“high yield maize belt”
Claim · model-written summary
Calculated optimum maize plant density exceeded actual density in R-1 through R-5 by 60.0, 55.2, 47.3, 84.8, and 59.6%, respectively.
- Outcome
- optimum plant densitye0
- Direction
- increasede0
- Value
- 60.0, 55.2, 47.3, 84.8, and 59.6%e0
- Comparator
- actual densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimum plant density could be increased by 60.0, 55.2, 47.3, 84.8, and 59.6% compared to the actual density”
e1“high yield maize belt”
Claim · model-written summary
Increasing density was projected to increase maize grain yield by 20.2, 18.3, 10.9, 18.1, and 15.3% across R-1 through R-5.
- Treatment
- increasing plant densitye0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 20.2, 18.3, 10.9, 18.1, and 15.3%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the grain yield could be increased by 20.2, 18.3, 10.9, 18.1, and 15.3% through increasing plant density”
e1“high yield maize belt”
Claim · model-written summary
Increasing maize density was projected to reduce yield gaps by 33.7, 23.0, 13.4, 17.3, and 10.4% across R-1 through R-5.
- Treatment
- increasing plant densitye0
- Outcome
- yield gapse0
- Direction
- reducee0
- Value
- 33.7, 23.0, 13.4, 17.3, and 10.4%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“through increasing plant density, which could reduce the yield gaps of 33.7, 23.0, 13.4, 17.3, and 10.4% in R (region)-1, R-2, R-3, R-4, and R-5, respectively”
e1“high yield maize belt”
Claim · model-written summary
Matching maize density to solar radiation is recommended to reduce yield gaps.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“matching maize plant density and solar radiation is an effective approach to reduce yield gaps in different regions of China”
The same questions in other papers
density · yield · Zea mays (maize)Positive and negative results
518 papers in the same direction as this paper · 132 in the opposite direction · 7 reporting no difference from an alternative
- positive
- positive
- positive
654 papers more in this group
See all 658 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.