Legume nitrogen credits for sugarcane production: implications for soil N availability and ratoon yield
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Legume nitrogen credits for sugarcane production : implications for soil N availability and ratoon yield. / Tenelli, Sarah; Otto, Rafael; de Castro, Saulo Augusto Quassi; Sánchez, Camilo Ernesto Bohórquez; Sattolo, Thales Meinl Schmiedt; Kamogawa, Marcos Yassuo; Pagliari, Paulo Humberto; Carvalho, João Luís Nunes.
I: Nutrient Cycling in Agroecosystems, Bind 113, Nr. 3, 15.04.2019, s. 307-322.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Legume nitrogen credits for sugarcane production
T2 - implications for soil N availability and ratoon yield
AU - Tenelli, Sarah
AU - Otto, Rafael
AU - de Castro, Saulo Augusto Quassi
AU - Sánchez, Camilo Ernesto Bohórquez
AU - Sattolo, Thales Meinl Schmiedt
AU - Kamogawa, Marcos Yassuo
AU - Pagliari, Paulo Humberto
AU - Carvalho, João Luís Nunes
N1 - Funding Information: Acknowledgements This project was funded by Fundac¸ão de Amparo à Pesquisa do Estado de São Paulo (FAPESP Process 2014/05591-0). R. Otto received a research productivity fellowship from the Brazilian National Council for Scientific and Technological Development (CNPq) (grant #308007/2016-6). To the sugarcane units Usina Quata, Usina Cerradinho and Usina Boa Vista for providing fields and operation support. Publisher Copyright: © 2019, Springer Nature B.V.
PY - 2019/4/15
Y1 - 2019/4/15
N2 - One of the steps needed to achieve sustainable bioenergy is to reduce our reliance on synthetic nitrogen (N). Despite the fact that legume cover crops have the potential to increase soil quality and sugarcane (Saccharum spp.) yield, much information is still needed to determine amount of N available from cover crops to sequential ratoon cycles. This study was designed to assess the impacts of sunn hemp (Crotalaria spectabilis) cover crop on soil N dynamics and sugarcane ratoon response to N fertilization during two harvest seasons across three contrasting soil and climatic conditions in southern Brazil. The treatments consisted of cover crop and fallow established prior to sugarcane replanting; in addition to three N-fertilizer rates 60, 120 and 180 kg N ha −1 and a 0-N control applied during the first and second ratoons. Although there was increased sugarcane yield (8–13 Mg ha −1 in first ratoon and 10–16 Mg ha −1 in second ratoon) in plots planted with cover crop, it was not possible to detect significant increases in soil inorganic N, microbial biomass C and Illinois Soil N Test content under cover crop compared with fallow. Cover crop with sunn hemp increased the accumulated two-year yields by 14–25 Mg ha −1 at all sites and NUE (Mg stalks kg −1 N) across all N rates at two sites. Our findings support the conclusion that cover crop did not change the N requirement of succeeding ratoon crops but increases the yield, thereby improving NUE in sugarcane systems.
AB - One of the steps needed to achieve sustainable bioenergy is to reduce our reliance on synthetic nitrogen (N). Despite the fact that legume cover crops have the potential to increase soil quality and sugarcane (Saccharum spp.) yield, much information is still needed to determine amount of N available from cover crops to sequential ratoon cycles. This study was designed to assess the impacts of sunn hemp (Crotalaria spectabilis) cover crop on soil N dynamics and sugarcane ratoon response to N fertilization during two harvest seasons across three contrasting soil and climatic conditions in southern Brazil. The treatments consisted of cover crop and fallow established prior to sugarcane replanting; in addition to three N-fertilizer rates 60, 120 and 180 kg N ha −1 and a 0-N control applied during the first and second ratoons. Although there was increased sugarcane yield (8–13 Mg ha −1 in first ratoon and 10–16 Mg ha −1 in second ratoon) in plots planted with cover crop, it was not possible to detect significant increases in soil inorganic N, microbial biomass C and Illinois Soil N Test content under cover crop compared with fallow. Cover crop with sunn hemp increased the accumulated two-year yields by 14–25 Mg ha −1 at all sites and NUE (Mg stalks kg −1 N) across all N rates at two sites. Our findings support the conclusion that cover crop did not change the N requirement of succeeding ratoon crops but increases the yield, thereby improving NUE in sugarcane systems.
KW - Biological N fixation
KW - Cover crop
KW - Crotalaria spectabilis
KW - Illinois soil nitrogen test
KW - Inorganic N
KW - Saccharum spp
UR - http://www.scopus.com/inward/record.url?scp=85062002635&partnerID=8YFLogxK
U2 - 10.1007/s10705-019-09979-y
DO - 10.1007/s10705-019-09979-y
M3 - Journal article
AN - SCOPUS:85062002635
VL - 113
SP - 307
EP - 322
JO - Nutrient Cycling in Agroecosystems
JF - Nutrient Cycling in Agroecosystems
SN - 1385-1314
IS - 3
ER -
ID: 327390320