Soil organic matter pools and crop yields as affected by the rate of farmyard manure and use of biodynamic preparations in a sandy soil
Soil organic matter pools and crop yields as affected by the rate of farmyard manure and use of biodynamic preparations in a sandy soil
复制标题
沙土中农家肥用量和生物动力制剂使用对土壤有机质库和作物产量的影响
DOI:
10.1007/s13165-011-0010-7
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发表时间:
2011
影响因子:
--
通讯作者:
Ludwig
中科院分区:
文献类型:
--
作者:
Heitkamp;Ludwig
One aim of organic and biodynamic agriculture is to improve soil fertility. Our objectives are to (1) explain previously reported differences in the soil organic matter levels between soils receiving farmyard manure (FYM) with or without biodynamic preparations (BD), (2) quantify the effect of three levels of FYM applications on microbial biomass and soil organic matter (SOM) pools with different stability, and (3) relate SOM pools to crop yields in a long-term experiment on a sandy soil at Darmstadt, Germany. Soils of the BD-FYM treatments had significantly higher Corgcontents compared to soils of the FYM treatments. However, soil fractionation indicated that there was a greater storage of Corgin the intermediate and passive pools of the BD-FYM treatments, and the temporal course of Corgcontents suggested a slow convergence of Corgstocks between FYM and BD-FYM with time. Thus, the observed differences between BD-FYM and FYM treatments were likely to have existed since the beginning of the experiment. Contents of labile C (70–114 g [kg Corg],−1turnover time 462 days) and labile N (35–49 g [kg Nt]−1, turnover time of 153 days) were strongly related to the application rate and also to crop yields. Yield of potatoes, winter rye, and clover significantly increased in proportion to the application rate of FYM, while BD had no effect. Overall, the study showed that increasing rates of FYM increased C and N availability independent of the use of BD. Nevertheless, efficiency of C sequestration in a more stable form (intermediate pool) decreased with increasing rate.
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DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
B. Christensen
通讯作者:
B. Christensen
DOI:
10.1201/9780203739273
发表时间:
1998
期刊:
--
影响因子:
--
作者:
R. Lal;J. Kimble;R. Follett;B. Stewart
通讯作者:
R. Lal;J. Kimble;R. Follett;B. Stewart
影响因子:
2.7
作者:
M. Turinek;S. Grobelnik;M. Bavec;F. Bavec
通讯作者:
F. Bavec
DOI:
--
发表时间:
1977
期刊:
影响因子:
--
作者:
D. Sauerbeck
通讯作者:
D. Sauerbeck
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
J. Raupp;M. Oltmanns
通讯作者:
M. Oltmanns