Abstract
Intercropping is one of the most vital practice to improve land utilization rate in China that has limited arable land resource. However, the traditional intercropping systems have many disadvantages including illogical field lay-out of crops, low economic value, and labor deficiency, which cannot balance the crop production and agricultural sustainability. In view of this, we developed a novel soybean strip intercropping model using maize as the partner, the regular maize-soybean strip intercropping mainly popularized in northern China and maize-soybean relay-strip intercropping principally extended in southwestern China. Compared to the traditional maize-soybean intercropping systems, the main innovation of field lay-out style in our present intercropping systems is that the distance of two adjacent maize rows are shrunk as a narrow strip, and a strip called wide strip between two adjacent narrow strips is expanded reserving for the growth of two or three rows of soybean plants. The distance between outer rows of maize and soybean strips are expanded enough for light use efficiency improvement and tractors working in the soybean strips. Importantly, optimal cultivar screening and increase of plant density achieved a high yield of both the two crops in the intercropping systems and increased land equivalent ratio as high as 2.2. Annually alternative rotation of the adjacent maize- and soybean-strips increased the grain yield of next seasonal maize, improved the absorption of nitrogen, phosphorus, and potasium of maize, while prevented the continuous cropping obstacles. Extra soybean production was obtained without affecting maize yield in our strip intercropping systems, which balanced the high crop production and agricultural sustainability.
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Claims 6
Claim · model-written summary
Cultivar screening and higher density achieved high yield of both crops.
- Taxon
- maize-soybeant0
- Treatment
- optimal cultivar screening and increase of plant densitye0
- Outcome
- high yield of both the two cropse0
- Direction
- highe0
Not reportedComparator
Verbatim
e0“optimal cultivar screening and increase of plant density achieved a high yield of both the two crops in the intercropping systems”
t0“Maize-soybean”
Claim · model-written summary
The intercropping systems raised land equivalent ratio as high as 2.2.
Verbatim
e0“increased land equivalent ratio as high as 2.2”
t0“Maize-soybean”
Claim · model-written summary
Annual alternate strip rotation increased next season maize grain yield.
- Treatment
- Annually alternative rotation of the adjacent maize- and soybean-stripse0
- Outcome
- grain yield of next seasonal maizee0
- Direction
- increasede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Annually alternative rotation of the adjacent maize- and soybean-strips increased the grain yield of next seasonal maize”
Claim · model-written summary
Annual alternate strip rotation improved maize N, P and potassium absorption.
- Treatment
- Annually alternative rotation of the adjacent maize- and soybean-stripst0
- Outcome
- absorption of nitrogen, phosphorus, and potasium of maizee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“improved the absorption of nitrogen, phosphorus, and potasium of maize”
t0“Annually alternative rotation of the adjacent maize- and soybean-strips”
Claim · model-written summary
Annual alternate strip rotation prevented continuous cropping obstacles.
- Taxon
- maize-soybeant0
- Treatment
- Annually alternative rotation of the adjacent maize- and soybean-stripse0
- Outcome
- continuous cropping obstaclese0
- Direction
- preventede0
Not reportedComparator
Verbatim
e0“Annually alternative rotation of the adjacent maize- and soybean-strips increased the grain yield of next seasonal maize, improved the absorption of nitrogen, phosphorus, and potasium of maize, while prevented the continuous cropping obstacles”
t0“Maize-soybean”
Claim · model-written summary
The strip systems produced extra soybean without affecting maize yield.
- Taxon
- soybean
Glycine maxe0 - Outcome
- Extra soybean productione0
- Direction
- Extrae0
- Qualifier
- without affecting maize yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Extra soybean production was obtained without affecting maize yield in our strip intercropping systems”
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