Abstract
Increasing planting density is an important ways to increase maize yield. A hot topic of conversation in the current research is how to improve crop light efficiency and yield potential by optimizing the cultivation mode under high density planting is a hot topic in current research. Thus, in this study, a field experiment was conducted to explore the effects of stereo-planting patterns on water and the utilization light resource and maize yields. Planting patterns included the conventional flat planting pattern (as the control, CK) and the stereo-planting in ridge and furrow (T). Each planting pattern had three planting densities, i.e., 60,000 plants ha−1 (D1), 75,000 plants ha−1 (D2) and 90,000 plants ha−1 (D3). The results showed that stereo-planting affected the physiological characteristics of plants by changing the spatial distribution of soil moisture. At the silking stage (R1), photosynthetic rate (Pn) of plants on the ridge was similar to CK, and transpiration rate (Tr) was significantly lower than that of CK. Pn of maize in the furrow was significantly higher than that of CK, and Tr was similar to CK. Stereoscopic planting had different effects on intraspecific competition intensity in maize population in different growing stages. In the six-leaf stage (V6), stereo-planting increased competition intensity of maize on the ridge, but lowered that of maize in the furrow by affecting the spatial distribution of soil moisture. During the R1 stage, stereo-planting increased the light transmittance rate within the canopy and eased the plant’s competition for light by reducing plant height and leaf area of maize under three density conditions. Stereo-planting had no effect on grain yield and dry matter accumulation of ridge-planted maize in the later growing stage, but it did increased the dry matter accumulation and grain yield of furrow-planted maize due to the improvement of the light environment and photosynthetic characteristics of the population. In two test years, stereo-planting increased 5.0–11.0% average yield of maize compared to CK under three density conditions. These results indicate that stereo-planting can reduce the plant’s competition for light and water resources and improve its physiological traits of plant by optimizing its spatial distribution of soil moisture and canopy structure, thus further increasing grain yield of maize under high-density planting conditions.
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Claims 11
Claim · model-written summary
At silking, ridge maize photosynthetic rate was similar to flat-planted maize.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the silking stage (R1), photosynthetic rate (Pn) of plants on the ridge was similar to CK”
t0“Maize (Zea mays L.)”
Claim · model-written summary
At silking, ridge maize transpiration was significantly lower than flat-planted maize.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants on the ridge was similar to CK, and transpiration rate (Tr) was significantly lower than that of CK”
t0“Maize”
Claim · model-written summary
At silking, furrow maize photosynthetic rate exceeded flat-planted maize significantly.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pn of maize in the furrow was significantly higher than that of CK”
Claim · model-written summary
At silking, furrow maize transpiration was similar to flat-planted maize.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize in the furrow was significantly higher than that of CK, and Tr was similar to CK”
t0“Maize”
Claim · model-written summary
At the six-leaf stage, stereo-planting increased competition intensity of ridge maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the six-leaf stage (V6), stereo-planting increased competition intensity of maize on the ridge”
Claim · model-written summary
At the six-leaf stage, stereo-planting lowered competition intensity of furrow maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stereo-planting increased competition intensity of maize on the ridge, but lowered that of maize in the furrow”
Claim · model-written summary
At silking, stereo-planting increased canopy light transmittance.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the R1 stage, stereo-planting increased the light transmittance rate within the canopy”
t0“Maize”
Claim · model-written summary
At silking, stereo-planting reduced maize height and leaf area under all three densities.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reducing plant height and leaf area of maize under three density conditions”
Claim · model-written summary
Stereo-planting did not affect late-stage grain yield or dry matter of ridge maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stereo-planting had no effect on grain yield and dry matter accumulation of ridge-planted maize in the later growing stage”
Claim · model-written summary
Stereo-planting increased furrow maize dry matter accumulation and grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it did increased the dry matter accumulation and grain yield of furrow-planted maize”
Claim · model-written summary
Across two years and three densities, stereo-planting increased average maize yield 5.0–11.0% versus flat planting.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In two test years, stereo-planting increased 5.0–11.0% average yield of maize compared to CK under three density conditions”
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