当前位置: X-MOL 学术Soil Sci. Soc. Am. J. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Long-term effects of nitrogen and phosphorus fertilization on soil aggregate stability and aggregate-associated carbon and nitrogen in the North China Plain
Soil Science Society of America Journal ( IF 2.9 ) Pub Date : 2020-11-11 , DOI: 10.1002/saj2.20197
Huayan Zhang 1, 2 , Ling'an Niu 1, 3 , Kelin Hu 1 , Jinmin Hao 1, 2 , Fan Li 1, 2 , Xiang Wang 1 , Hong Chen 1, 2
Affiliation  

Soil aggregates and carbon storage are important in soil conservation, nutrient supply, and climate change mitigation. The long-term responses of aggregate-associated organic C (OC) and nitrogen (N) in surface versus subsoil to N and P fertilization remain unclear. We examined the effects of different N and P fertilization rates on aggregate stability and the associated soil OC (SOC) and N in the North China Plain through a 35-yr double-crop field experiment, hypothesizing that higher rates of mineral fertilizer would promote aggregate stability and increase C/N ratios in large macroaggregates. The OC and N were highest in the silt + clay fraction, accounting for 34 to 48% of bulk SOC and 28 to 47% of bulk soil N at 0 to 20 cm, and 38 to 62% of bulk SOC and 40 to 62% of bulk soil N at 20 to 40 cm. After 35 yr, N + P fertilization increased SOC (16–35%) and N (21–27%), especially the 540 kg N + 67.5 kg P treatment; the N + P fertilizer also increased the OC and N of the macroaggregate, microaggregate, and silt + clay fractions at 0 to 20 cm. The N + P fertilizer treatments increased bulk soil C/N ratios; the C/N ratios of large macroaggregates decreased. Nitrogen and P fertilizer did not affect aggregate stability. Long-term N and P fertilization increased SOC concentrations, and altered OC and N distributions in aggregates. Quantifying the impacts of long-term fertilization strategies on organic matter sequestration and soil stabilization is important.

中文翻译:

施氮磷肥对华北平原土壤团聚体稳定性及团聚体相关碳氮的长期影响

土壤团聚体和碳储存在土壤保持、养分供应和减缓气候变化方面很重要。地表与底土中与聚集体相关的有机碳 (OC) 和氮 (N) 对 N 和 P 施肥的长期响应仍不清楚。我们通过一项为期 35 年的双季大田试验研究了不同 N 和 P 施肥量对团聚体稳定性和相关土壤有机碳 (SOC) 和 N 的影响,假设较高的矿物肥料施用量会促进团聚体稳定性并提高大型团聚体的 C/N 比。OC 和 N 在粉砂 + 粘土部分最高,在 0 至 20 cm 处占整体 SOC 的 34-48% 和整体土壤 N 的 28-47%,占整体 SOC 的 38-62% 和 40-62% 20 至 40 cm 处的大块土壤 N。35岁之后,N + P 施肥增加了 SOC (16–35%) 和 N (21–27%),尤其是 540 kg N + 67.5 kg P 处理;N + P 肥料还增加了 0 到 20 cm 处的大团聚体、微团聚体和粉砂 + 粘土部分的 OC 和 N。N+P肥料处理增加了土壤C/N比;大团聚体的 C/N 比下降。氮肥和磷肥不影响集料稳定性。长期施氮和磷会增加 SOC 浓度,并改变聚集体中 OC 和 N 的分布。量化长期施肥策略对有机物封存和土壤稳定的影响很重要。N+P肥料处理增加了土壤C/N比;大团聚体的 C/N 比下降。氮肥和磷肥不影响集料稳定性。长期施氮和磷会增加 SOC 浓度,并改变聚集体中 OC 和 N 的分布。量化长期施肥策略对有机物封存和土壤稳定的影响很重要。N+P肥料处理增加了土壤C/N比;大团聚体的 C/N 比下降。氮肥和磷肥不影响集料稳定性。长期施氮和磷会增加 SOC 浓度,并改变聚集体中 OC 和 N 的分布。量化长期施肥策略对有机物封存和土壤稳定的影响很重要。
更新日期:2020-11-11
down
wechat
bug