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| Costa,Claudio Hideo Martins da; Crusciol,Carlos Alexandre Costa; Ferrari Neto,Jayme; Castro,Gustavo Spadotti Amaral. |
| Abstract The objective of this work was to evaluate the long-term effects of the surface application of lime on soil fertility and on the mineral nutrition and grain yield of soybean, and of black oat and sorghum in crop succession. The experiment was carried out on a clayey Oxisol, in a randomized complete block design, with four replicates. Treatments consisted of lime the rates of 0, 1,000, 2,000, and 4,000 kg ha-1, applied in October 2002 and November 2004. Soil samples were collected at five soil layers, down to 0.60-m depth. Surface liming was effective in reducing soil acidity and increasing Ca2+ and Mg2+ contents in the subsurface. Moreover, it increased available phosphorus contents and soil organic matter in the long term (48 to 60 months after... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crop rotation; Long-term experiment; Plant nutrition; Soil fertility; Subsurface soil acidity; Yield components. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901633 |
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| Chen,Yanling; Xin,Li; Liu,Jintao; Yuan,Mingzhang; Liu,Shutang; Jiang,Wen; Chen,Jingpei. |
| ABSTRACT: Straw returning is an effective way to improve soil quality. Whether the bacterial community development has been changed by long-term straw returning in non-calcareous soil is not clear. In this study, the following five treatments were administered: soil without fertilizer (CK); wheat and corn straw returning (WC); wheat straw returning with 276 kg N ha−1 yr−1 (WN); manure, 60,000 kg ha−1 pig manure compost (M) and wheat and corn straw returning with 276 kg N ha−1 yr−1 (WCN). The high-throughput 16S rRNA sequencing technology was used to evaluate the bacterial communities. The results showed that the community was composed mostly of two dominant groups (Proteobacteria and Acidobacteria). Bacterial diversity increased after the application of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Long-term experiment; Soil quality; Soil bacterial composition. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000500349 |
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