Abstract
Abstract Soil properties and plants influence soil microbial community diversity, and their role in nutrient cycling could influence plant productivity; however, it is not clear the relationships between soil bacterial communities, soil moisture, and nitrogen (N) content, and whether these associations influence plant productivity. In this study, we investigated how the soil microbial community affects root zone productivity in winter wheat. We also verified whether productivity can be improved by water adjustment and N management in drip irrigation field experiments (I0, natural condition; I1, jointing to heading stage S1 55%–80%θ f , field capacity, anthesis to mature stage S2 70%–80%θ f ; I2, S1 55%–90%θ f , S2 70%–90%θ f ; and I3, S1 55%–100%θ f , S2 70%–100%θ f ) and under different N application rates (N0, N1, N2, and N3 represent 0, 150, 200, and 250 kg N ha −1 ). Soil moisture and N application rate significantly influenced water use efficiency (WUE), N use efficiency (NUE), yield, and soil bacterial abundance and diversity in the wheat root zone. N application decreased the richness indices in un‐irrigated soils (I0), whereas it initially increased, and then decreased the indices in irrigated soils (I1, I2, and I3). The primary factor influencing the dominant bacterial taxa was soil moisture content (SMC), followed by root length density (RLD). The root system and soil bacterial diversity strong influenced wheat yield. The I1N1 treatment resulted in the highest root weight density (RWD), WUE, and NUE, and thus increased wheat yield; furthermore, it had the least influence on the diversity of soil bacteria. Our work suggests that the response of bacterial communities to soil moisture and nitrogen content largely regulates crop production in agro‐ecosystems, and that regulating soil moisture and nitrogen fertilizer use may provide a sustainable solution for maintaining farmland productivity.
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Claims 10
Claim · model-written summary
Moisture and nitrogen significantly influenced WUE and NUE.
- Taxon
- wheat
Triticum aestivumt0 - Outcome
- water use efficiency (WUE), N use efficiency (NUE)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil moisture and N application rate significantly influenced water use efficiency (WUE), N use efficiency (NUE)”
t0“wheat”
Claim · model-written summary
Moisture and nitrogen significantly influenced yield.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil moisture and N application rate significantly influenced water use efficiency (WUE), N use efficiency (NUE), yield”
t0“wheat”
Claim · model-written summary
Moisture and nitrogen significantly influenced bacterial abundance and diversity.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- soil bacterial abundance and diversitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil moisture and N application rate significantly influenced water use efficiency (WUE), N use efficiency (NUE), yield, and soil bacterial abundance and diversity in the wheat root zone”
t0“wheat”
Claim · model-written summary
Nitrogen decreased bacterial richness without irrigation.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- richness indicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N application decreased the richness indices in un‐irrigated soils (I0)”
t0“wheat”
Claim · model-written summary
Nitrogen first increased then decreased richness under irrigation.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- indicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it initially increased, and then decreased the indices in irrigated soils (I1, I2, and I3)”
t0“wheat”
Claim · model-written summary
Soil moisture was the main driver of dominant bacterial taxa.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- dominant bacterial taxae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The primary factor influencing the dominant bacterial taxa was soil moisture content (SMC), followed by root length density (RLD)”
t0“wheat”
Claim · model-written summary
Roots and bacterial diversity influenced yield.
- Taxon
- wheatTriticum aestivume0
- Outcome
- wheat yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root system and soil bacterial diversity strong influenced wheat yield”
Claim · model-written summary
I1N1 had the highest root weight density, WUE and NUE.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- root weight density (RWD), WUE, and NUEe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The I1N1 treatment resulted in the highest root weight density (RWD), WUE, and NUE”
t0“wheat”
Claim · model-written summary
I1N1 increased wheat yield.
- Taxon
- wheatTriticum aestivume0
- Outcome
- wheat yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The I1N1 treatment resulted in the highest root weight density (RWD), WUE, and NUE, and thus increased wheat yield”
Claim · model-written summary
I1N1 had the least effect on bacterial diversity.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- diversity of soil bacteriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it had the least influence on the diversity of soil bacteria”
t0“wheat”