Abstract
A field research was conducted in the Agricultural High-tech Demonstration Park in Horqin District of Tongliao, Inner Mongolia, using the maize variety Nonghua 101 with two cropping modes, including strip-till with staggered planting (seeding strip tillage, 15 cm + 45 cm narrow-double row staggered sowing, TGCW) and conventional tillage with equal row space (rotary tillage with row space of 60 cm, CK), and three planting densities (67,500 plants hm–2, 82,500 plants hm–2, and 97,500 plants hm–2) in 2017 and 2018 to study the effect of strip-till with staggered planting on regulating spring maize yield formation and coordination characteristics of shoot-root in irrigation areas of Xiliao river plain. The model of that strip-till with staggered planting enhanced maize yield by 13.1% and 13.8% in 2017 and 2018, under the planting density 82,500 plants hm–2 compared with CK, respectively. The strip-till with staggered planting showed a distinct advantage on the amount and rate of dry matter accumulation after silking, which obviously delayed the senility of leaves in later growth stage, meanwhile, compared with CK, the light transmittance significantly increased in or above panicle layers. The leaf area index, net photosynthetic rate and population photosynthetic potential in the model of strip-till with staggered planting were higher than those in CK in late growth stage. At later growing stage, the strip-till with staggered planting had significantly higher root dry weight than CK in different soil layers, with the highest root ratio in 20–60 cm, especially under higher planting density. The grain yield against per unit of root weight at silking and root-shoot ratio at maturity had a distinct advantage. In conclusion the strip-till with staggered planting combined with high planting density can increase light transmission rate in above-spike layer in late growing stage, alleviate leaf area decline, increase production capacity, facilitate root growth and increase root ratio in deeper soil layers. Shoot-root coordination under dense planting is one of the main reasons facilitating yield increase of spring maize in irrigation areas of Xiliao river plain.
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Claims 9
Claim · model-written summary
Strip tillage with staggered planting increased maize yield by 13.1% in 2017.
- Treatment
- strip-till with staggered plantinge1
- Outcome
- maize yielde0
- Direction
- enhancede0
- Value
- 13.1%e0
- Qualifier
- 82,500 plants hm–2e0
- Comparator
- CKe0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhanced maize yield by 13.1% and 13.8% in 2017 and 2018, under the planting density 82,500 plants hm–2 compared with CK”
e1“strip-till with staggered planting showed a distinct advantage on the amount and rate of dry matter accumulation after silking”
Claim · model-written summary
Strip tillage with staggered planting increased maize yield by 13.8% in 2018.
- Treatment
- strip-till with staggered plantinge1
- Outcome
- maize yielde0
- Direction
- enhancede0
- Value
- 13.8%e0
- Qualifier
- 82,500 plants hm–2e0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhanced maize yield by 13.1% and 13.8% in 2017 and 2018, under the planting density 82,500 plants hm–2 compared with CK”
e1“strip-till with staggered planting showed a distinct advantage on the amount and rate of dry matter accumulation after silking”
Claim · model-written summary
Strip tillage improved post silking dry matter accumulation amount and rate.
- Treatment
- strip-till with staggered plantinge0
- Outcome
- amount and rate of dry matter accumulation after silkinge0
- Direction
- distinct advantagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strip-till with staggered planting showed a distinct advantage on the amount and rate of dry matter accumulation after silking”
t1“spring maize”
Claim · model-written summary
Strip tillage delayed leaf senility in later growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“obviously delayed the senility of leaves in later growth stage”
t1“spring maize”
e1“strip-till with staggered planting showed a distinct advantage on the amount and rate of dry matter accumulation after silking”
Claim · model-written summary
Strip tillage significantly increased light transmittance in or above panicle layers.
- Organ / stage
- panicle layerse0
- Treatment
- strip-till with staggered plantinge1
- Outcome
- light transmittancee0
- Direction
- increasede0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with CK, the light transmittance significantly increased in or above panicle layers”
t1“spring maize”
e1“strip-till with staggered planting showed a distinct advantage on the amount and rate of dry matter accumulation after silking”
Claim · model-written summary
Strip tillage raised leaf area index, net photosynthesis and population photosynthetic potential late in growth.
- Treatment
- strip-till with staggered plantinge0
- Outcome
- leaf area index, net photosynthetic rate and population photosynthetic potentiale0
- Direction
- highere0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf area index, net photosynthetic rate and population photosynthetic potential in the model of strip-till with staggered planting were higher than those in CK in late growth stage”
t1“spring maize”
Claim · model-written summary
Strip tillage significantly increased root dry weight in multiple soil layers.
- Treatment
- strip-till with staggered plantinge0
- Outcome
- root dry weighte0
- Direction
- highere0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strip-till with staggered planting had significantly higher root dry weight than CK in different soil layers”
t1“spring maize”
Claim · model-written summary
Root ratio was highest at 20–60 cm, especially at high density.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the highest root ratio in 20–60 cm, especially under higher planting density”
t1“spring maize”
Claim · model-written summary
Yield per root weight at silking and root shoot ratio at maturity showed an advantage.
- Outcome
- grain yield against per unit of root weight at silking and root-shoot ratio at maturitye0
- Direction
- distinct advantagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain yield against per unit of root weight at silking and root-shoot ratio at maturity had a distinct advantage”
t1“spring maize”
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