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沿磷供应梯度的羊草生物量积累和养分利用的响应。

Responses of biomass accumulation and nutrient utilization along a phosphorus supply gradient in Leymus chinensis.

机构信息

College of Resources and Environment, Xinjiang Agricultural University, Urumqi, 830052, Xinjiang, China.

The Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences and Ministry of Education, Yangling, 712100, Shanxi, China.

出版信息

Sci Rep. 2023 Apr 6;13(1):5660. doi: 10.1038/s41598-023-31402-4.

DOI:10.1038/s41598-023-31402-4
PMID:37024558
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10079846/
Abstract

Phosphorus (P) deficiencies are widespread in calcareous soils. The poor availability of nitrogen (N) and P in soils often restricts crop growth. However, the effects of P addition on plant growth and plant nutrient transport changes during the establishment of Leymus chinensis fields in Xinjiang are not clear. We investigated the responses of Leymus chinensis biomass and nutrient absorption and utilization to changes in soil N and P by adding P (0, 15.3, 30.6, and 45.9 kg P ha year) with basally applied N fertilizer (150 kg N ha year). The results showed that (a) Principal component analysis (PCA) of biomass, nutrient accumulation, soil available P, and soil available N during the different periods of Leymus chinensis growth showed that their cumulative contributions during the jointing and harvest periods reached 95.4% and 88%, respectively. (b) Phosphorus use efficiency (PUE) increased with the increase of P fertilizer gradient and then decreased and the maximum PUE was 13.14% under moderate P addition. The accumulation of biomass and nutrients in Leymus chinensis can be effectively improved by the addition of P fertilizer at 30.6 kg ha. Different P additions either moderately promoted or excessively inhibited Leymus chinensis growth and nutrient utilization.

摘要

磷（P）缺乏在石灰性土壤中普遍存在。土壤中氮（N）和 P 的供应不足常常限制作物的生长。然而，在新疆建立羊草草地过程中，P 添加对植物生长和植物养分运输变化的影响尚不清楚。我们通过添加 P（0、15.3、30.6 和 45.9 kg P ha 年）与基础施用 N 肥（150 kg N ha 年），研究了羊草生物量和养分吸收利用对土壤 N 和 P 变化的响应。结果表明：（a）羊草生长不同时期生物量、养分积累、土壤有效 P 和土壤有效 N 的主成分分析（PCA）表明，在分蘖期和收获期的累积贡献分别达到 95.4%和 88%。（b）磷利用效率（PUE）随 P 肥梯度的增加而增加，然后降低，在中度 P 添加下达到 13.14%。30.6 kg ha 的 P 肥添加可以有效提高羊草生物量和养分的积累。不同的 P 添加量要么适度促进，要么过度抑制羊草的生长和养分利用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/d9ecc687a824/41598_2023_31402_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/b15bb764cb07/41598_2023_31402_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/67a5c963be43/41598_2023_31402_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/ab60b741f1b4/41598_2023_31402_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/cb69ef4aba34/41598_2023_31402_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/0de6c9c1a356/41598_2023_31402_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/01ec9faa02a2/41598_2023_31402_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/806f73f50250/41598_2023_31402_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/d9ecc687a824/41598_2023_31402_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/b15bb764cb07/41598_2023_31402_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/67a5c963be43/41598_2023_31402_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/ab60b741f1b4/41598_2023_31402_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/cb69ef4aba34/41598_2023_31402_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/0de6c9c1a356/41598_2023_31402_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/01ec9faa02a2/41598_2023_31402_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/806f73f50250/41598_2023_31402_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9172/10079846/d9ecc687a824/41598_2023_31402_Fig8_HTML.jpg

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