Abstract
Liming is widely used to decrease soil acidity, and the application of lime alone or in combination with other amendments, such as gypsum, is a viable agricultural practice to improve soil nutrient status and crop yield. However, the effects of applying lime and gypsum alone or in combination on the microbial population and N cycle in intercropped no-till tropical systems are largely unknown. Here, we determined the lasting effects of applying lime and gypsum individually or in combination on soil chemical properties, N uptake by intercropped plants, maize yield, archaeal and bacterial abundances, and N cycle genes in the maize and ruzigrass rhizospheres in a long-term field experiment in tropical soil with a no-till maize and forage ruzigrass intercropping system. Our results showed that the application of lime or lime + gypsum increased soil fertility and the gene abundances of microorganisms responsible for biological nitrogen fixation and reduced gene abundances of nitrification and denitrification in the soil and rhizosphere of ruzigrass and maize. The accompanying increases in Ca2+ and Mg2+ availability, reduced Al3+ levels, and balance of micronutrient availability, mainly Mn, in the soil strongly influenced the responses of N cycle genes and enhanced plant N-acquisition and maize yield.
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Claims 5
Claim · model-written summary
Lime or lime plus gypsum increased soil fertility.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of lime or lime + gypsum increased soil fertility”
e1“maize and forage ruzigrass intercropping system”
Claim · model-written summary
Lime or lime plus gypsum increased abundance of biological nitrogen fixation genes in soil and rhizospheres.
- Treatment
- lime or lime + gypsume0
- Outcome
- gene abundances of microorganisms responsible for biological nitrogen fixatione0
- Direction
- increasede0
- Setting
- soil and rhizosphere of ruzigrass and maizee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of lime or lime + gypsum increased soil fertility and the gene abundances of microorganisms responsible for biological nitrogen fixation and reduced gene abundances of nitrification and denitrification in the soil and rhizosphere of ruzigrass and maize”
Claim · model-written summary
Lime or lime plus gypsum reduced nitrification and denitrification gene abundances in soil and rhizospheres.
- Treatment
- lime or lime + gypsume0
- Outcome
- gene abundances of nitrification and denitrificatione0
- Direction
- reducede0
- Setting
- soil and rhizosphere of ruzigrass and maizee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of lime or lime + gypsum increased soil fertility and the gene abundances of microorganisms responsible for biological nitrogen fixation and reduced gene abundances of nitrification and denitrification in the soil and rhizosphere of ruzigrass and maize”
Claim · model-written summary
Changes in Ca2+, Mg2+, Al3+ and micronutrient availability influenced N cycle gene responses.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The accompanying increases in Ca2+ and Mg2+ availability, reduced Al3+ levels, and balance of micronutrient availability, mainly Mn, in the soil strongly influenced the responses of N cycle genes and enhanced plant N-acquisition and maize yield”
e1“maize and forage ruzigrass intercropping system”
Claim · model-written summary
Soil chemical changes enhanced plant N acquisition and maize yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The accompanying increases in Ca2+ and Mg2+ availability, reduced Al3+ levels, and balance of micronutrient availability, mainly Mn, in the soil strongly influenced the responses of N cycle genes and enhanced plant N-acquisition and maize yield”
The same questions in other papers
lime · soil: chemistry · Zea mays (maize)Results differ
35 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- no effect
- negative
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See all 42 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.