Abstract
If the intercropping components have a complementarit y effect in consuming environmental resources, the crop production will be more in intercropping compared to sole crops. A field experiment was carried out in during 2003 to investigate the competition and complementarity between intercropped components of corn and cowpea in nutrient uptake. A randomized complete block design (RCBD) was employed to compare the treatments including cowpea sole crop (Cp), corn sole crop (C), within-row intercropping (M1), alternate intercropping (M2) and mixed intercropping (M3). Intercropping was conducted as replacement method, where one corn plant was replaced by three cowpea plants. The results indicated that nutrient uptake by intercropping was more than sole crop which should be noticified for nutrient supply of the next crops. Cowpea was more competitive than corn in absorbing divalent cations (Ca and Mg) for its high root cation exchange capacity. However, corn was more competitive for phosphorus and potassium which is related to its expanded root system. For all intercrops, relative yield total (RYT) was significantly higher than unity, indicating that corn and cowpea were complement for nutrient consumption. This shows the advantage of intercropping in consuming an effective environmental resource for production, compared to sole crops.
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Claims 6
Claim · model-written summary
Intercropping had higher nutrient uptake than sole cropping.
- Taxon
- corn and cowpea
Vigna unguiculata
Zea mays subsp. mayse1 - Treatment
- intercroppinge0
- Outcome
- nutrient uptakee0
- Direction
- more thane0
- Comparator
- sole crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nutrient uptake by intercropping was more than sole crop”
e1“between intercropped components of corn and cowpea in nutrient uptake”
Claim · model-written summary
Cowpea was more competitive than corn for calcium and magnesium absorption.
- Taxon
- CowpeaVigna unguiculatae0
- Outcome
- absorbing divalent cations (Ca and Mg)e0
- Direction
- more competitivee0
- Comparator
- corne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea was more competitive than corn in absorbing divalent cations (Ca and Mg) for its high root cation exchange capacity”
Claim · model-written summary
Corn was more competitive for phosphorus and potassium absorption.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- phosphorus and potassiume0
- Direction
- more competitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn was more competitive for phosphorus and potassium which is related to its expanded root system”
Claim · model-written summary
Cowpea competitive uptake of divalent cations was attributed to its high root cation exchange capacity.
- Taxon
- CowpeaVigna unguiculatae0
- Outcome
- absorbing divalent cations (Ca and Mg)e0
- Qualifier
- high root cation exchange capacitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea was more competitive than corn in absorbing divalent cations (Ca and Mg) for its high root cation exchange capacity”
Claim · model-written summary
Corn competitiveness for phosphorus and potassium was linked to its expanded root system.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- phosphorus and potassiume0
- Qualifier
- expanded root systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn was more competitive for phosphorus and potassium which is related to its expanded root system”
Claim · model-written summary
All corn–cowpea intercrops had relative yield totals significantly above one.
- Taxon
- corn and cowpeaVigna unguiculataZea mays subsp. mayse1
- Treatment
- all intercropse0
- Outcome
- relative yield total (RYT)e0
- Direction
- higher thane0
- Comparator
- unitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For all intercrops, relative yield total (RYT) was significantly higher than unity”
e1“between intercropped components of corn and cowpea in nutrient uptake”
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