Revista Brasileira de Milho e Sorgo最新文献_第5页

PHYSIOLOGICAL QUALITY IN SEEDS FROM HAPLOID INDUCERS IN MAIZE 玉米单倍体诱导剂种子的生理品质

Revista Brasileira de Milho e Sorgo Pub Date : 2022-01-13 DOI: 10.18512/rbms2021v20e1214

Ana Carolina Valle Da Silva, R. S. Trindade, B. Mariz, M. Ribeiro, D. Netto, Nádia Lacerda DURÃES PARELLA, I. R. D. DE SOUZA, Bianca Machado Campos Trindade, L. J. M. Guimarães, P. E. Guimarães

{"title":"PHYSIOLOGICAL QUALITY IN SEEDS FROM HAPLOID INDUCERS IN MAIZE","authors":"Ana Carolina Valle Da Silva, R. S. Trindade, B. Mariz, M. Ribeiro, D. Netto, Nádia Lacerda DURÃES PARELLA, I. R. D. DE SOUZA, Bianca Machado Campos Trindade, L. J. M. Guimarães, P. E. Guimarães","doi":"10.18512/rbms2021v20e1214","DOIUrl":"https://doi.org/10.18512/rbms2021v20e1214","url":null,"abstract":"The objective of the present work was to evaluate the physiological quality in seeds of haploidy inducers of different types and origins. To this end, between December 2015 and March 2016, a series of physiological quality assessments were conducted on nine genotypes inducing haploidy in corn, namely: the gymnogenetic inducers Stock 6, TAIL P1 and TAIL P2; the hybrid between the TAIL P1 x TAIL P2 inductors; the hybrid TAIL P2 x TAIL P1, analogous to the previous hybrid, but with inversion of the female parent at the crossing; and androgenetic inducers W23, 90109 igig, 91202 igig and 91207 igig. The tests carried out were germination, accelerated aging, emergence in a bed, emergence index, fresh and dry mass, length of aerial part and root and the ratio between these characteristics, the humidity and the weight of 100 seeds. The results indicated that the physiological quality was improved throughout the selection for greater haploid induction. The haploidy induction system (andorgenetic or gymnogenetic) does not interfere with physiological quality, however the results obtained reinforce the need for care in the multiplication and conservation of haploidy inducing seeds in tropical conditions for their use in breeding.","PeriodicalId":34859,"journal":{"name":"Revista Brasileira de Milho e Sorgo","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43093642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AGRONOMIC PERFORMANCE OF MAIZE HYBRIDS DERIVED FROM DOUBLED HAPLOID LINES COMPARED TO CONVENTIONAL HYBRIDS 双单倍体玉米杂交种与常规杂交种的农艺性能比较

Revista Brasileira de Milho e Sorgo Pub Date : 2021-12-13 DOI: 10.18512/rbms2021v20e1218

Luciano José Lourençoni, R. S. Trindade, Luana Cristina Alves Ribeiro, N. N. L. D. Parrella, P. E. Guimarães, L. J. M. Guimarães, Bianca Machado Campos Trindade, M. Ribeiro

{"title":"AGRONOMIC PERFORMANCE OF MAIZE HYBRIDS DERIVED FROM DOUBLED HAPLOID LINES COMPARED TO CONVENTIONAL HYBRIDS","authors":"Luciano José Lourençoni, R. S. Trindade, Luana Cristina Alves Ribeiro, N. N. L. D. Parrella, P. E. Guimarães, L. J. M. Guimarães, Bianca Machado Campos Trindade, M. Ribeiro","doi":"10.18512/rbms2021v20e1218","DOIUrl":"https://doi.org/10.18512/rbms2021v20e1218","url":null,"abstract":"– The objective of this work was to use the partial diallel methodology to compare double-haploid lines (DHs) of maize with lines obtained by traditional methods. To obtain hybrids, five double-haploid lines, used as female parents, were crossed with four testers, as male parents. Twenty hybrids were obtained from double-haploid lines, being: 8 experimental, and 8 commercial from Embrapa and 4 from other companies. Were evaluated; final stand (ST), tipping and breaking (LODG), plant height (PH), ear insertion height (EH), grain moisture at harvest (GM) and total grain weight (YIELD). Analysis of variance was performed, unfolding the degrees of freedom of the genotype, Tukey test at 5% probability, and the decomposition of the sums of squares of the treatments into general and specific combining ability for testers and DH lines. PH and EH were higher in hybrids derived from DHs lines, while productivity and final stand were higher in experimental controls. However, some hybrids, such as the hybrid DH1800007 presented higher YIELD than commercial and experimental controls. The data obtained demonstrate that hybrids derived from double-haploid lines, in addition to accelerating the time to obtain new cultivars, enable the development of hybrids with superior agronomic performance.","PeriodicalId":34859,"journal":{"name":"Revista Brasileira de Milho e Sorgo","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42578119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SOWING PERIOD AND ESTIMATED MAIZE PRODUCTION FOR SILAGE UNDER TROPICAL CONDITIONS 热带条件下青贮玉米播种期及产量估算

Revista Brasileira de Milho e Sorgo Pub Date : 2021-12-13 DOI: 10.18512/rbms2021v20e1219

C. L. T. Andrade, M. L. A. D. Melo, Jennifer Alves Camilo, T. A. Amaral, I. R. P. Souza, R. Simeão

引用次数: 0

MAIZE INTERCROPPING AND NITROGEN FERTILIZATION AIMING GRAIN YIELD AND IMPLEMENT A NO-TILL SYSTEM 玉米间作氮肥以粮食产量为目标并实行无公害制度

Revista Brasileira de Milho e Sorgo Pub Date : 2021-10-28 DOI: 10.18512/rbms2021v20e1225

J. Deienno, S. S. Souza, A. P. Coelho, L. B. Lemos

{"title":"MAIZE INTERCROPPING AND NITROGEN FERTILIZATION AIMING GRAIN YIELD AND IMPLEMENT A NO-TILL SYSTEM","authors":"J. Deienno, S. S. Souza, A. P. Coelho, L. B. Lemos","doi":"10.18512/rbms2021v20e1225","DOIUrl":"https://doi.org/10.18512/rbms2021v20e1225","url":null,"abstract":"DOI: https://doi.org/10.18512/rbms2021v20e1225 MAIZE INTERCROPPING AND NITROGEN FERTILIZATION AIMING GRAIN YIELD AND IMPLEMENT A NO-TILL SYSTEM Abstract – Intercropping grain crops with cover crops is a sustainable cultivation strategy that is useful for ensuring straw production for the no-tillage system (NTS) implementation and supply of nutrients, especially N, for successive crops. The aim of this study was to evaluate the influence of maize (Zea mays L.) cropping systems (CSs), when grown alone or intercropped with sunn hemp and ruzigrass, in combination with N fertilization in topdressing, on the maize agronomic performance and straw accumulation with NTS implementation. The experiment was conducted during the 2017/2018 season with a randomized block design in a split-plot scheme with four replications. The plots comprised maize alone, intercropped with sunn hemp (Crotalaria spectabilis), or intercropped with ruzigrass (Urochloa ruziziensis). The subplots were under four N rates: 0, 70, 140, and 210 kg ha-1. The intercropping systems promoted greater N accumulation and straw production and did not reduce grain yield (GY). The addition of N fertilizers increased leaf nitrogen content (LNC) and GY. Intercropping reduced maize LNC; however, higher N fertilizer application in topdressing mitigated this effect. The intercropping of maize with cover crops is a viable and sustainable alternative for agriculture, as maize GY is not affected, and there is a greater straw production and N accumulation. Therefore, NTS implementation will help in increasing N supply in successive crops.","PeriodicalId":34859,"journal":{"name":"Revista Brasileira de Milho e Sorgo","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45036287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

AZOSPIRILLUM BRASILENSE INNOCULATION COMBINED WITH DIFFERENT LEVELS OF NITROGEN FERTILIZATION AND ITS EFFECTS IN THE GRAIN SORGHUM SUBJECTED TO WATER RESTRICTION 巴西氮螺旋菌接种配施不同水平氮肥对限水高粱的影响

Revista Brasileira de Milho e Sorgo Pub Date : 2021-10-28 DOI: 10.18512/rbms2021v20e1215

Ana Paula LIMA DE PAIVA, P. Magalhães, L. P. de Carvalho, Hadassa Fortuna Jales, C. C. Gomes Júnior, U. G. de Paula Lana, I. Marriel

{"title":"AZOSPIRILLUM BRASILENSE INNOCULATION COMBINED WITH DIFFERENT LEVELS OF NITROGEN FERTILIZATION AND ITS EFFECTS IN THE GRAIN SORGHUM SUBJECTED TO WATER RESTRICTION","authors":"Ana Paula LIMA DE PAIVA, P. Magalhães, L. P. de Carvalho, Hadassa Fortuna Jales, C. C. Gomes Júnior, U. G. de Paula Lana, I. Marriel","doi":"10.18512/rbms2021v20e1215","DOIUrl":"https://doi.org/10.18512/rbms2021v20e1215","url":null,"abstract":"One of the major problems in the present scenario is the effect of climate changes and their consequences to the agriculture, mainly due to decreasing water availability. Water restriction is a limiting factor on plants growth, and it can lead to morphophysiological modifications as well as alterations in the plant’s development. Sorghum is a grass widely utilized in agriculture due to its outstanding characteristic of drought resistance, which is higher than the other grasses, therefore being the fifth most sowed grain in the world. The inoculation of growth-promoting rhizobacteria in plants can promote growth and remodel its root system, decreasing the impacts of water restriction. In this sense, this study aims to evaluate the effects of Azospirillum brasilense inoculation in mitigating the water restriction effects in the grain sorghum BRS 332 subjected to two different levels of nitrogen fertilization. Our experiment was carried out in a greenhouse under monitored conditions of temperature and moisture. Plants were treated with two distinct irrigation conditions, two A. brasilense inoculants, one treatment without inoculation, and two levels of nitrogen fertilization (high and low nitrogen fertilization). It was evaluated the differences in their ecophysiological and crop production characteristics. The results showed that plants subjected to drought and associated to rhizobacteria invested in shoot parts, which provided this hybrid higher efficiency between water absorption and loss, and consequently higher stomata efficiency during drought when compared to the control treatment. There was also an increment in the production of the grains, particularly flagrant under lower doses of nitrogen, minimizing the effects caused by drought and decreasing the need to utilize fertilizers.","PeriodicalId":34859,"journal":{"name":"Revista Brasileira de Milho e Sorgo","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46587423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SELECTIVITY OF HERBICIDES APPLIED ALONE AND IN TANK MIXTURES TO SWEET SORGHUM IN POST-EMERGENCE 甜高粱出苗期除草剂单独施用和罐内混合施用的选择性

Revista Brasileira de Milho e Sorgo Pub Date : 2021-10-19 DOI: 10.18512/rbms2021v20e1205

Mariucélio SANTOS LIMA, Luiz Augusto INOJOSA FERREIRA, D. F. Biffe, Leonardo RIBEIRO FERNANDES, Rubem SILVÉRIO DE OLIVEIRA JÚNIOR

{"title":"SELECTIVITY OF HERBICIDES APPLIED ALONE AND IN TANK MIXTURES TO SWEET SORGHUM IN POST-EMERGENCE","authors":"Mariucélio SANTOS LIMA, Luiz Augusto INOJOSA FERREIRA, D. F. Biffe, Leonardo RIBEIRO FERNANDES, Rubem SILVÉRIO DE OLIVEIRA JÚNIOR","doi":"10.18512/rbms2021v20e1205","DOIUrl":"https://doi.org/10.18512/rbms2021v20e1205","url":null,"abstract":"The small number of herbicides registered for sorghum (Sorghum bicolor (L.) Moench) restricts its cultivation. The aim of this study was to evaluate the selectivity of herbicides applied alone or in tank mixtures to sweet sorghum in post-emergence. Two experiments were conducted in greenhouse, the first with herbicides applied alone and the second with herbicide mixtures. Based on the results of greenhouse experiments, treatments were selected to evaluate selectivity in the field. In the field experiment, the herbicides applied alone and herbicide mixtures did not differentiate from the control without herbicide application regarding to phytotoxicity, fresh mass of the aerial part, percentage of dry mass of the aerial part and Brix of sweet sorghum at 28 days after application. The treatments considered selective were: atrazine (1000 to 2000), bentazon (360 to 720), S-metolachlor (576 to 864), mesotrione (48 to 150), carfentrazone (4 to 8), 2,4-D amine (335 to 670), besides mixtures with [atrazine + S-metolachlor] [601 + 471.2] and [901.5+ 706.8], atrazine + 2,4-D amine (1000 to 2000 + 100.5 to 268), atrazine + tembotrione (1000 + 42 to 63) and atrazine + mesotrione (1000 + 48 to 72) (doses in g a.i. ha-1).","PeriodicalId":34859,"journal":{"name":"Revista Brasileira de Milho e Sorgo","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45017838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

INTERFERENCE OF INCREASING DENSITIES OF SOURGRASS IN GRAIN SORGHUM 高粱中酸草密度增加的干扰

Revista Brasileira de Milho e Sorgo Pub Date : 2021-10-19 DOI: 10.18512/rbms2021v20e1213

Aline Guimarães Cruvinel, G.B.P. Braz, G. Simon, A. Silva, Leandro C. Ribeiro, Tulio Porto Gonçalo

{"title":"INTERFERENCE OF INCREASING DENSITIES OF SOURGRASS IN GRAIN SORGHUM","authors":"Aline Guimarães Cruvinel, G.B.P. Braz, G. Simon, A. Silva, Leandro C. Ribeiro, Tulio Porto Gonçalo","doi":"10.18512/rbms2021v20e1213","DOIUrl":"https://doi.org/10.18512/rbms2021v20e1213","url":null,"abstract":"Sourgrass has a high competitive potential, resulting in yield losses of several crops. With the increase of grain sorghum cultivation in the Cerrado, mainly in the second crop, studies are needed to assess the interference of sourgrass on this crop. The objective of this work was to evaluate the interference of increasing densities of sourgrass on the sorghum crop under Cerrado conditions. The field experiment was carried out in a randomized block design, with four replications. Five treatments, composed of densities of 0, 2, 4, 6, and 8 sourgrass plants per m-2, were evaluated. To simulate the densities of sourgrass, this species was planted in the predecessor crop (soybean) according to the predicted density in each experimental unit, and later, at the time of sowing the sorghum, the sourgrass plants, which were clogged, were cut, in order to simulate the condition provided by mechanized harvesting. During the evaluation of the effect of the treatments on the sorghum crop, the stand and plant height, stalk diameter, panicle length, mass of 100 grains, and yield were measured. The increase in sourgrass density, in coexistence with sorghum, negatively affects all vegetative and reproductive parameters evaluated in the crop. For each sourgrass plant m-2, in coexistence with sorghum, there was a reduction in yield equivalent to 445 kg ha-1. The maximum reduction in sorghum yield observed was 87%, in a condition in which the crop was developed in coexistence at the density of 8 sourgrass plants m-2.","PeriodicalId":34859,"journal":{"name":"Revista Brasileira de Milho e Sorgo","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45586815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

TRINEXAPAC-ETHYL REDUCES PLANT HEIGHT AND SEED YIELD IN FORAGE SORGHUM 三氟乙酸降低饲料高粱株高和种子产量

Revista Brasileira de Milho e Sorgo Pub Date : 2021-09-03 DOI: 10.18512/rbms2021v20e1212

M. P. MINGOTE JULIO, P. Magalhães, Athos Rodrigues Soares Viana, Bruno Henrique MINGOTE JULIO, C. V. Santos, N. N. L. D. Parrella, Cícero Beserra de Menezes

{"title":"TRINEXAPAC-ETHYL REDUCES PLANT HEIGHT AND SEED YIELD IN FORAGE SORGHUM","authors":"M. P. MINGOTE JULIO, P. Magalhães, Athos Rodrigues Soares Viana, Bruno Henrique MINGOTE JULIO, C. V. Santos, N. N. L. D. Parrella, Cícero Beserra de Menezes","doi":"10.18512/rbms2021v20e1212","DOIUrl":"https://doi.org/10.18512/rbms2021v20e1212","url":null,"abstract":"Forage sorghum presents tall plants, what makes mechanicalseed harvesting a difficult task. Plant hormones can reduce plant height andfacilitate the harvesting. Thus, the objective of this study was to evaluatethe effect of the growth regulator trinexapac-ethyl on plant height and seedyield in forage sorghum. This research was carried out at Embrapa Maizeand Sorghum, in two seasons (2017 and 2018), in a randomized completeblock design, four replications and three varieties (BRS Ponta Negra, 1141574and 0947216) under application of Trinexapac-ethyl in two stages of the plantgrowth (V8, V12, V8 + V12). The characteristics evaluated were: plant height,seed yield and mass of 1000 seeds. The effect of the hormone was significantin both stages of growth, with a significant reduction in plant height. Thehormone applied twice at growth stages V8 + V12 had a greater effect inreducing plant height. However, the hormone reduced seed yield in the threevarieties, what implies the need for further studies comparing the advantageof plant height reduction and the loss in seed yield.","PeriodicalId":34859,"journal":{"name":"Revista Brasileira de Milho e Sorgo","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44424638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SILAGE PRODUCTION, BROMATOLOGICAL COMPOSITION AND ECONOMIC VIABILITY OF INOCULATION OF VARIETAL MAIZES WITH 青贮饲料的生产、牧草的营养成分及接种玉米的经济可行性

Revista Brasileira de Milho e Sorgo Pub Date : 2021-09-03 DOI: 10.18512/rbms2021v20e1174

Thays Gabriella Lima Silva, R. Valicheski, F. L. Claudio, E. M. Alves, Mateus DE Sousa Peres, P. A. P. Salviano

{"title":"SILAGE PRODUCTION, BROMATOLOGICAL COMPOSITION AND ECONOMIC VIABILITY OF INOCULATION OF VARIETAL MAIZES WITH","authors":"Thays Gabriella Lima Silva, R. Valicheski, F. L. Claudio, E. M. Alves, Mateus DE Sousa Peres, P. A. P. Salviano","doi":"10.18512/rbms2021v20e1174","DOIUrl":"https://doi.org/10.18512/rbms2021v20e1174","url":null,"abstract":"In the western region of the State of Goias family farmers that depend onthe raising of livestock as one of their main sources of income are predominant. These farmers periodically grow maize for the production of silage in order to compensate their incomes. Considering the high cost of hybrid seeds and nitrogen fertilization, technologies that contribute to the reduction of silage production costs are required. In this sense, the objective of this study was to evaluate the response of maize genetic materials (Feroz Hybrid VIP3 and varieties SCS 156 and SCS 154), regarding silage production, bromatological composition and economic viability when inoculated with Azospirillum brasilense. The experiment was carried out on strips using a completely randomized design with four replications. Each cultivar responded differently to inoculation. For the Feroz hybrid and SCS 156 variety, the use of Azospirillum provided increases of 13.1% and 42.1% in green stem mass and 11.2 and 30.3% in silage nitrogen content, influencing the nutritional composition of the bulky food produced. For the SCS 154 variety, there was no response to inoculation. As for the economic viability, the use of inoculated SCS 156 variety presents a better rate of rentability, proving to be more economically attractive and viable to farmers.","PeriodicalId":34859,"journal":{"name":"Revista Brasileira de Milho e Sorgo","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45337500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

LEAF DIAGNOSIS AND PRODUCTIVITY OF FORAGE SORGHUM FERTIGATED WITH NITROGEN DOSES IN TWO HARVESTS 两季施氮饲用高粱叶片诊断与生产力

Revista Brasileira de Milho e Sorgo Pub Date : 2021-07-06 DOI: 10.18512/RBMS2021V20E1201

Ê. G. Souza, Denisson Lima do Nascimento, Raquel Paz da Silva, T. P. Silva, Dalbert de F. Pereira, Juliana Souza Barros, E. A. Cruz, M. Silva

{"title":"LEAF DIAGNOSIS AND PRODUCTIVITY OF FORAGE SORGHUM FERTIGATED WITH NITROGEN DOSES IN TWO HARVESTS","authors":"Ê. G. Souza, Denisson Lima do Nascimento, Raquel Paz da Silva, T. P. Silva, Dalbert de F. Pereira, Juliana Souza Barros, E. A. Cruz, M. Silva","doi":"10.18512/RBMS2021V20E1201","DOIUrl":"https://doi.org/10.18512/RBMS2021V20E1201","url":null,"abstract":"The aim of the present study was to evaluate the degrees of macronutrients in the diagnostic leaf and the productivity of forage sorghum IPA 467, submitted to fertigation with nitrogen doses, during two harvests (summer and winter), both without regrowth. From January 20 to May 18 and from June 17 and October 14, 2016, two experiments were conducted in Caninde de Sao Francisco, State of Sergipe, in the Brazilian semi-arid. The experimental design was randomized complete blocks, with four replications. The treatments consisted of four doses of N (0; 80; 160 and 240 kg ha-1). Joint analysis of variance was carried out, considering each different harvest as a new factor. The characteristics evaluated were the content of nitrogen (N), phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg) in the leaves, height of the plant, diameter of the stem,green mass productivity, dry mass productivity and percentage of dry mass. The macronutrient content in the leaves was incremented with increasing doses of N, except Ca which presented no influence. The winter crop promoted the highest content of K, while the summer crop presented an elevated absorption of Mg. The varying dosage of N or the harvests season did not influence dry mass productivity (average of 17,386 ton/ha-1). The content of N (23.16-26.68 g kg-1), P (3.16-4.11 g kg-1), K (10.98-33.36 g kg-1), Ca (3.61 g kg-1) and Mg (4.78-9.64 g kg-1) can be considered enough for the full development of the plant.","PeriodicalId":34859,"journal":{"name":"Revista Brasileira de Milho e Sorgo","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46799476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0