Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1016/j.pedsph.2023.09.002 |
| Titel (primär) | Biological nitrogen fixation in rice paddy soils is driven by multiple edaphic factors and available phosphorus is the greatest contributor |
| Autor | Hu, T.; Zhang, Y.; Wang, H.; Jin, H.; Liu, B.; Lin, Z.; Ma, J.; Wang, X.; Liu, Q.; Liu, H.; Chen, Z.; Zhou, R.; Jin, P.; Zhu, J.; Liu, G.; Bei, Q.
; Lin, X.; Xie, Z. |
| Quelle | Pedosphere |
| Erscheinungsjahr | 2023 |
| Department | BOOEK |
| Sprache | englisch |
| Topic | T5 Future Landscapes |
| Keywords | available molybdenum; available soil nitrogen; influencing factors; multiplicative effect; rice field; soil fertility |
| Abstract | Biological nitrogen fixation (BNF) is important for sustainable rice cultivation. Various edaphic factors have been individually evaluated for their effects on BNF in paddy soils. However, no single factor could fully explain the different soil outcomes. Paddy BNF is more likely to be simultaneously influenced to various degrees by combinations of several factors; however, the relative importance of the interaction of multiple edaphic factors on the regulation of BNF in rice soils is still unclear. Twenty-seven paddy soil samples with different soil properties were collected from major cropping areas in southwest and northeast China. Rice was transplanted into pots of these soils and grown in a 15N2 enriched airtight chamber. Estimation of BNF was based on measurements of 15N enrichment in the different soils and rice plants at the end of a 77-d incubation period. BNF amounts ranged from 0.66 to 12.3 kg ha−1. BNF had a significant positive relationship with available phosphorus (AP) and significant quadratic relationships with available molybdenum (AMo) and total soil nitrogen (TN). AP explained 42% of the observed variation in BNF, TN explained 17%, and AMo explained 13%. The specific interaction between the soil cation exchange capacity (CEC) and available soil N (ASN, as determined by rice N uptake) accounted for 28% of the variation. BNF was reduced when AP was < 14 mg kg−1, AMo < 0.09 mg kg−1, or when TN was > 3.2 g kg−1. These results provide valuable benchmarks that could be used to guide farmers in managing their soils to improve the potential contribution of paddy BNF to soil fertility. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=27912 |
| Hu, T., Zhang, Y., Wang, H., Jin, H., Liu, B., Lin, Z., Ma, J., Wang, X., Liu, Q., Liu, H., Chen, Z., Zhou, R., Jin, P., Zhu, J., Liu, G., Bei, Q., Lin, X., Xie, Z. (2023): Biological nitrogen fixation in rice paddy soils is driven by multiple edaphic factors and available phosphorus is the greatest contributor Pedosphere 10.1016/j.pedsph.2023.09.002 |
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