{"title":"半干旱草原植物生物量分配对降水时间变化的响应","authors":"Huiru Jin, Chunkun Fan, Hongyan Zhu, Yuxian Zhang, Rui Xiao, Zhongling Yang","doi":"10.1007/s11104-024-06928-9","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Background and aims</h3><p>Precipitation changes can affect patterns of biomass allocation by altering species composition. However, how shifts in species with different growth forms under precipitation changes affect above- and belowground biomass allocation and the vertical root distribution remains unclear.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>We conducted a 7-year experiment in a semi-arid grassland in northern China to explore how plant biomass allocation responds to changed precipitation during different periods of the growing season.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>The results showed that both decreased precipitation during the late (DLP) and entire (DP) growing season significantly reduced forb ANPP. In contrast, increased precipitation during the early (IEP), late (ILP), and entire (IP) growing season significantly increased forb ANPP. Decreased precipitation during the early (DEP) growing season, DP, IEP, and ILP significantly reduced grass ANPP. Changes in the abundance of grasses and forbs with different growth forms altered biomass allocation patterns. DEP and DP augmented the proportion of BNPP, and DLP had little effect on BNPP. IP decreased the proportion of BNPP, whereas neither IEP nor ILP affected the proportion of BNPP. DP significantly decreased the proportion of BNPP<sub>0-20 cm</sub>, and IEP and ILP increased the proportion of BNPP<sub>0-20 cm</sub>.</p><h3 data-test=\"abstract-sub-heading\">Conclusion</h3><p>Our findings indicate that precipitation during the early growing season determines the allocation of above- and belowground productivity and the distribution of shallow roots by altering soil moisture, and precipitation during the late growing season with large changes in water availability determines the deep root distribution by shifting the composition of plant species with different root distribution.</p>","PeriodicalId":20223,"journal":{"name":"Plant and Soil","volume":null,"pages":null},"PeriodicalIF":3.9000,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Responses of plant biomass allocation to changed precipitation timing in a semi-arid steppe\",\"authors\":\"Huiru Jin, Chunkun Fan, Hongyan Zhu, Yuxian Zhang, Rui Xiao, Zhongling Yang\",\"doi\":\"10.1007/s11104-024-06928-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<h3 data-test=\\\"abstract-sub-heading\\\">Background and aims</h3><p>Precipitation changes can affect patterns of biomass allocation by altering species composition. However, how shifts in species with different growth forms under precipitation changes affect above- and belowground biomass allocation and the vertical root distribution remains unclear.</p><h3 data-test=\\\"abstract-sub-heading\\\">Methods</h3><p>We conducted a 7-year experiment in a semi-arid grassland in northern China to explore how plant biomass allocation responds to changed precipitation during different periods of the growing season.</p><h3 data-test=\\\"abstract-sub-heading\\\">Results</h3><p>The results showed that both decreased precipitation during the late (DLP) and entire (DP) growing season significantly reduced forb ANPP. In contrast, increased precipitation during the early (IEP), late (ILP), and entire (IP) growing season significantly increased forb ANPP. Decreased precipitation during the early (DEP) growing season, DP, IEP, and ILP significantly reduced grass ANPP. Changes in the abundance of grasses and forbs with different growth forms altered biomass allocation patterns. DEP and DP augmented the proportion of BNPP, and DLP had little effect on BNPP. IP decreased the proportion of BNPP, whereas neither IEP nor ILP affected the proportion of BNPP. DP significantly decreased the proportion of BNPP<sub>0-20 cm</sub>, and IEP and ILP increased the proportion of BNPP<sub>0-20 cm</sub>.</p><h3 data-test=\\\"abstract-sub-heading\\\">Conclusion</h3><p>Our findings indicate that precipitation during the early growing season determines the allocation of above- and belowground productivity and the distribution of shallow roots by altering soil moisture, and precipitation during the late growing season with large changes in water availability determines the deep root distribution by shifting the composition of plant species with different root distribution.</p>\",\"PeriodicalId\":20223,\"journal\":{\"name\":\"Plant and Soil\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.9000,\"publicationDate\":\"2024-08-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Plant and Soil\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://doi.org/10.1007/s11104-024-06928-9\",\"RegionNum\":2,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"AGRONOMY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plant and Soil","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1007/s11104-024-06928-9","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRONOMY","Score":null,"Total":0}
Responses of plant biomass allocation to changed precipitation timing in a semi-arid steppe
Background and aims
Precipitation changes can affect patterns of biomass allocation by altering species composition. However, how shifts in species with different growth forms under precipitation changes affect above- and belowground biomass allocation and the vertical root distribution remains unclear.
Methods
We conducted a 7-year experiment in a semi-arid grassland in northern China to explore how plant biomass allocation responds to changed precipitation during different periods of the growing season.
Results
The results showed that both decreased precipitation during the late (DLP) and entire (DP) growing season significantly reduced forb ANPP. In contrast, increased precipitation during the early (IEP), late (ILP), and entire (IP) growing season significantly increased forb ANPP. Decreased precipitation during the early (DEP) growing season, DP, IEP, and ILP significantly reduced grass ANPP. Changes in the abundance of grasses and forbs with different growth forms altered biomass allocation patterns. DEP and DP augmented the proportion of BNPP, and DLP had little effect on BNPP. IP decreased the proportion of BNPP, whereas neither IEP nor ILP affected the proportion of BNPP. DP significantly decreased the proportion of BNPP0-20 cm, and IEP and ILP increased the proportion of BNPP0-20 cm.
Conclusion
Our findings indicate that precipitation during the early growing season determines the allocation of above- and belowground productivity and the distribution of shallow roots by altering soil moisture, and precipitation during the late growing season with large changes in water availability determines the deep root distribution by shifting the composition of plant species with different root distribution.
期刊介绍:
Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.