Macro and micronutrients uptake in biomass sorghum

Abstract

Biomass sorghum [Sorghum bicolor (L.) Moench] is a very promising renewable source to produce energy obtained by cogeneration and fermentation processes. However, some aspects of the fertilizer management for this crop should be better understood. This study aimed to determine the accumulation progress of dry matter and macro and micronutrients in phenological stages of the biomass sorghum (Palo Alto 2562) crop, as well as to establish the accumulation order. The experiment was performed in a randomized block design, with four replicates. In order to determine the dry matter and nutrient accumulation curves, the plants were sampled in nine phenological stages (V1, V3, V5, V7, V9, V11, booting, flowering and harvest). Dry matter and N, P, K, Ca, Mg, S, Cu, Fe, Mn and Zn accumulations were analyzed. The maximum dry matter accumulation was 24,853 kg ha-1. K was the nutrient absorbed in the highest amount (447 kg ha-1), what demonstrates the high capacity of the plant to absorb this nutrient. N was the second most accumulated nutrient by the plant (289 kg ha-1) and its absorption pattern suggests that it should be supplied up to the V7 stage. It was also possible to conclude that the order of extraction and accumulation of macro and micronutrients for the biomass sorghum crops is: K > N > Ca > Mg > S > P > Fe > Zn > Mn > Cu.

Potassic and nitrogen fertilization in a modern hybrid of sorghum for biomass production cultivated in an Oxisol

“…We observed that the highest estimated K accumulation in shoot biomass was 316.1 kg ha -1 , at the estimated dose of 134.8 kg ha -1 K, so the amount of K present in the soil was sufficient to nourish the plant. In this context, the high content of K in the soil may have covered the effect of K fertilization, even for biomass sorghum, which presents a very high capacity of K accumulation (Cavalcante et al, 2018). It is important to point out that the maximum accumulation of K in this study has not produced highest DM production, presenting that the biomass sorghum has a luxury characteristic for K consumption.…”

“…In a 4year experiment in North Carolina, USA, variation in removal of K by variety Blade ES5200 from 187 to 205 kg ha -1 of K was reported (Heitman et al, 2017). In Goiás, Brazil, an absorption accumulation curve experiment with the hybrid Palo Alto 2562 found an accumulation of 447 kg K ha -1 for a DM production of 24.4 Mg ha -1 (Cavalcante et al, 2018). For the other nutrients, in the condition of highest DM productin (21,5 Mg ha -1 with 0 kg ha -1 K) the accumulation in the shoot followed the order of: K ~ Ca > N > Mg > P > S > Fe > Zn > Mn > B > Cu.…”

“…In the same trial, the maximum dry matter yield (DM) was 33.94 Mg ha -1 , obtained by CMSXS 652 variety fertilized with 80 kg ha -1 of N and 180 kg ha -1 of K2O, representing an extraction of 242 kg ha -1 of N, 32 kg ha -1 of P and 298 kg ha -1 of K (Santos et al, 2015). In an absorption accumulation curve experiment, the hybrid Palo Alto 2562 (fertilized with 198 kg ha -1 of N and 285 kg ha -1 of K2O) has uptaken 289 kg ha -1 of N, 38 kg ha -1 of P and 447 kg ha -1 of K to produce 24.43 Mg ha -1 of DM (Cavalcante et al, 2018). Nitrogen has a key role in the chlorophyll molecule, as well as it is one of the responsible for the production of leaf area and regulation of the photosynthetic rate, being fundamental for the photosynthetic apparatus of the plant, which may reflect on the biomass production (Olson et al, 2013;Ameen et al, 2017;Tang et al, 2018).…”

Assessing the sweet sorghum-based ethanol potential on saline–alkali land with DSSAT model and LCA approach

“…And the sorghum stalks provide extra straw for fertilizing the next crop. Moreover, farmers obtain excellent profitability [ 32 ].…”

“…And the sorghum stalks provide extra straw for fertilizing the next crop. Moreover, farmers obtain excellent profitability [32]. According to the planting instructions of NexSteppe, five steps were implemented during the growth of PALO ALTO Biomass Sorghum, which included seed dressing, sowing, fertilizing, weeding, and fertilizing for a second time, as shown in Additional file 1: Appendix D. During field experiments, crop growth status was monitored and reported weekly, as shown in appendix E. The harvest date was November 4, 2014, and yield per hectare was 63,000 kg/ha.…”