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Increase in Silicate Fertilization Improves the Biomass of Drought-Tolerant Contrasting Cultivars Without Prejudicial effects in Nutrient Uptake in Sugarcane
Journal of Soil Science and Plant Nutrition ( IF 3.9 ) Pub Date : 2020-07-21 , DOI: 10.1007/s42729-020-00300-3
Mônica Sartori de Camargo , Natália Ganzaroli Bozza , Hamilton Seron Pereira , Vicente Mota Silva , Marcelo Almeida Silva

Studies are still scarce about silicate fertilization as a silicon (Si) supply to drought-tolerant contrasting sugarcane cultivars. The objective was determined whether the increase of Si rates up to 1000 kg ha−1 Si improves the Si in soil, Si uptake, and biomass of aerial part and root system of sugarcane without prejudicial effects in chemical attributes of soil and in nutrients absorption and whether Si concentration and biomass of drought-sensitive are increased similar to that of drought-tolerant sugarcane cultivar in the function of Si rates. An experiment was conducted in randomized blocks with cultivars (RB86-7515 = drought-tolerant; RB85-5536 = and drought-sensitive) and Si rates (0, 250, 500, 750, and 1000 kg ha−1 Si) using silicate in sandy soil. Fertilization increased Si contents in soil, Si contents and biomass of straw and stalks, Si in green leaves, and biomass of roots, independent of cultivars. The Si rates improved also the Ca in green leaves and Mn in straw, but reduced Ca and Mg in the soil and Mg concentration in the straw. Lower biomass and higher Si concentration were found in RB85-5536, and it was also true in RB86-7515 for the roots. Fertilization with Si rates up to 1000 kg ha−1 Si as silicate in sandy soil was not excessive, increasing Si availability, Si uptake in straw, green leaves, and stalks, and aerial part and root biomass, independently of cultivar without prejudicial effects in chemical attributes of soil and nutrient uptake in sugarcane.

中文翻译:

增加硅酸盐施肥可提高抗旱品种的生物量,而不会对甘蔗的养分吸收产生不利影响

关于硅酸盐施肥作为耐旱对比甘蔗品种的硅 (Si) 供应的研究仍然很少。目的是确定将硅含量增加到 1000 kg ha-1 Si 是否能改善土壤中的硅、硅吸收以及甘蔗地上部分和根系的生物量,而不会对土壤的化学属性和养分吸收和吸收产生不利影响。干旱敏感品种的Si浓度和生物量在Si率的作用下是否与耐旱甘蔗品种相似。在随机区组中对栽培品种(RB86-7515 = 耐旱;RB85-5536 = 和干旱敏感)和 Si 比率(0、250、500、750 和 1000 kg ha-1 Si)进行了试验,使用硅酸盐沙土。施肥增加了土壤中的硅含量、秸秆的硅含量和生物量,绿叶中的硅和根的生物量,与品种无关。Si 率还提高了绿叶中的 Ca 和秸秆中的 Mn,但降低了土壤中的 Ca 和 Mg 以及秸秆中的 Mg 浓度。在 RB85-5536 中发现较低的生物量和较高的 Si 浓度,在 RB86-7515 中的根也是如此。施肥量高达 1000 kg ha-1 Si 作为沙质土壤中的硅酸盐并不过量,增加了 Si 的有效性,增加了 Si 的可用性,提高了秸秆、绿叶和茎秆以及地上部分和根系生物量中的 Si 吸收量,与品种无关,没有不利影响甘蔗土壤和养分吸收的化学属性。在 RB85-5536 中发现较低的生物量和较高的 Si 浓度,在 RB86-7515 中的根也是如此。施肥量高达 1000 kg ha-1 Si 作为沙质土壤中的硅酸盐并不过量,增加了 Si 的有效性,增加了 Si 的有效性,提高了秸秆、绿叶和茎秆以及地上部分和根系生物量中的 Si 吸收量,与品种无关,不会对土壤产生不利影响甘蔗土壤和养分吸收的化学属性。在 RB85-5536 中发现较低的生物量和较高的 Si 浓度,在 RB86-7515 中的根也是如此。施肥量高达 1000 kg ha-1 Si 作为沙质土壤中的硅酸盐并不过量,增加了 Si 的有效性,增加了 Si 的有效性,提高了秸秆、绿叶和茎秆以及地上部分和根系生物量中的 Si 吸收量,与品种无关,不会对土壤产生不利影响甘蔗土壤和养分吸收的化学属性。
更新日期:2020-07-21
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