配施味精废浆促进杨树生长提高土壤活性有机碳及碳库管理指数

井大炜; 邢尚军; 刘方春; 马海林; 杜振宇; 马丙尧; 于学斗; 朱亚萍

doi:10.11975/j.issn.1002-6819.2016.z1.018

配施味精废浆促进杨树生长提高土壤活性有机碳及碳库管理指数

1.
德州学院，德州 253023
2.
山东省林业科学研究院，济南 250014

基金项目: 国家自然科学基金项目（31500513）；山东省农业重大应用技术创新课题"杨树超高产栽培关键技术研究"；山东省科技发展计划项目"山东省干旱瘠薄山地集雨造林关键技术研究"（2010GSF10621）；德州学院科技人才引进项目（311890）。

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出版历程
- 收稿日期: 2015-07-16
- 修回日期: 2015-11-30
- 发布日期: 2016-01-30

Applied monosodium glutamate wastewater promoting poplar growth, improving soil active organic carbon and carbon pool management index

1.
Dezhou University, Dezhou 253023, China
2.
Shandong Forestry Academy, Jinan 250014, China

摘要

摘要: 为探讨味精废浆改良林地土壤的生物学效应以及确定化肥与味精废浆配施的合适比例，以欧美I-107杨为试材，通过连续4 a的大田试验，研究了CK（对照，不施肥）、N100（尿素提供100%的氮）、M10N90（味精废浆和尿素分别提供10%与90%的氮）、M30N70（味精废浆和尿素分别提供30%与70%的氮）与M50N50（味精废浆和尿素各提供50%的氮）等处理对杨树林地土壤总有机碳、活性有机碳组分与其有效率、碳库管理指数（carbon pool management index，CPMI）及林木生长的影响。结果表明：同N100处理相比，M10N90、M30N70和M50N50处理的总有机碳含量均显著升高，其中M50N50处理明显高于其他处理；M30N70处理的活性有机碳（active organic carbon, AOC）、可溶性有机碳（dissolved organic carbon, DOC）、微生物量碳（microbial biomass carbon, MBC）含量及其有效率均达最高值，其中AOC质量分数分别较CK、N100、M10N90和M50N50处理显著高出43.58%、59.35%、20.71%和9.65%，DOC质量分数分别显著高出62.71%、52.38%、28.00%和14.29%；同时，M30N70处理的CPMI达到192.56，分别比N100、M10N90和M50N50处理明显提高89.45、43.58和30.86。此外，M30N70处理的胸径、树高和材积平均生长率分别为23.40%、21.62%和45.05%，亦明显高于其他处理。与M30N70处理相比，M10N90和M50N50处理对林地土壤活性有机碳各组分、CPMI和林木生长率的作用效果较小。相关性分析表明，材积生长率与AOC、AOC有效率、DOC、MBC和CPMI存在极显著相关关系(P<0.01)。可见，味精废浆与化肥以3∶7比例配施能提高杨树林地土壤活性有机碳含量和碳库管理指数，有利于改善土壤质量、提高土壤肥力，并促进林木生长，从而为味精废浆在林业上的高效利用提供理论依据。
- 土壤 /
- 有机碳 /
- 肥料 /
- 杨树 /
- 味精废浆 /
- 活性有机碳 /
- 碳库管理指数
Abstract: Abstract: Soil total organic carbon (TOC) is a stable and long-lasting carbon source and contains nearly all nutrients for plant growth, and therefore is a meaningful index for evaluating soil fertility. The quantity and quality of soil organic carbon influence soil potential productivity and reflect the spatial distribution and succession of plant community. However, it is not easy to detect short and medium term changes of total TOC due to the variation of soil background and natural level, and thus techniques that measure meaningful fractions of TOC should be used. The active organic carbon (AOC) as the component of TOC is a more sensitive indicator for environmental change. Although the proportion of AOC to TOC is very small, the AOC is closely related to soil productivity and plays important role in soil nutrient supply. Furthermore, the carbon pool management index (CPMI) calculated from changes in labile and total carbon relative to a reference soil shows to be a useful indicator for describing soil fertility. Therefore, analyzing the change rule of AOC and CPMI has important guiding significance for fertilization. In order to explore the biological effect of monosodium glutamate wastewater on soil improvement and determine the appropriate application level of inorganic fertilizer and monosodium glutamate wastewater for improving poplar growth, a field experiment including 5 treatments, i.e. CK (neither urea nor monosodium glutamate wastewater was applied), N100 (100% of nitrogen was provided by urea), M10N90 (10% and 90% of nitrogen were provided by monosodium glutamate wastewater and urea, respectively), M30N70 (30% and 70% of nitrogen were provided by monosodium glutamate wastewater and urea, respectively) and M50N50 (50% and 50% of nitrogen were provided by monosodium glutamate wastewater and urea, respectively) was performed. The present study was conducted to determine the effects of different treatments on TOC, AOC component and effective rate, CPMI in soil and poplar growth. Results indicated that in comparison to N100 treatment, the TOC content significantly increased under the treatments of M10N90, M30N70 and M50N50, and M50N50 treatment was apparently higher than other treatments. The AOC, dissolved organic carbon (DOC) and microbial biomass carbon (MBC) contents and their effective rates in M30N70 treatment all reached the maximum, of which AOC content was 43.58%, 59.35%, 20.71% and 9.65% higher than CK, N100, M10N90 and M50N50 respectively and DOC content was 62.71%, 52.38%, 28.00% and 14.29% higher than CK, N100, M10N90 and M50N50 respectively. In the meantime, the CPMI was 192.56 under the M30N70 treatment, which was 89.45, 43.58 and 30.86 higher than the treatments of N100, M10N90 and M50N50, respectively. Additionally, the average growth rates of diameter at breast height (DBH), tree height and volume in M30N70 treatment were 23.40%, 21.62% and 45.05%, respectively, which were also obviously higher than other treatments. However, in M10N90 and M50N50 treatments, less effects on AOC component and CPMI in the forest soil and tree growth rates were observed compared with M30N70 treatment. The correlation analysis showed that volume growth rate was extremely significantly correlated with AOC, AOC effective rate, DOC, MBC and CPMI (P<0.01). These results suggest that monosodium glutamate wastewater combined with inorganic fertilizer, especially M30N70 treatment, is beneficial to increase AOC content and CPMI of woodland soil, improve soil quality and fertility, and promote the growth of poplar. The results can provide theoretical foundation for the effective utilization of monosodium glutamate wastewater in forestry. In addition, we can speculate the monosodium glutamate wastewater combined with inorganic fertilizer would have broad application prospects in forest cultivation.
- soils /
- organic carbon /
- fertilizers /
- poplar /
- monosodium glutamate wastewater /
- active organic carbon /
- carbon pool management index

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参考文献(38)

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