Yield and Quality of Naturally Colored Cotton Fiber Fertilized with Phosphorus Rates in the Brazilian Semiarid

ABSTRACT

Cultivating naturally colored fiber cotton has excellent potential for the Northeast of Brazil. However, its cultivation in the semiarid occurs with low use of technology and inputs in soils with the low phosphorus content. This work evaluated the productivity and fiber quality of naturally colored cotton cultivars under phosphorus fertilization in the Brazilian semiarid region. The experimental design was randomized blocks, with treatments arranged in split plots and four replications. The five P doses were allocated in the main plot, and four cotton cultivars were in the subplots. Variance analyses were performed for the characteristics evaluated in each agricultural harvest. Tukey test was used to compare the averages for cultivars and agricultural harvests. Increased P availability increased productivity and fiber quality of naturally colored cotton cultivars. Maximum fiber yield was obtained at 240; 240; 199.11, and 60 kg ha⁻¹ in the first crop, respectively. The maximum fiber length was reached at 80.86 kg ha⁻¹ in the BRS Verde cultivar. The maximum uniformity was obtained with the 138.49 kg ha⁻¹, and the cultivar BRS Topázio obtained greater uniformity. Fiber strength increased with the application of P₂O₅.

摘要

在巴西东北部种植天然彩色纤维棉具有巨大的潜力. 然而，它在半干旱地区的种植是在低磷含量的土壤中低技术和低投入的情况下进行的. 本工作评估了巴西半干旱地区天然彩色棉花品种在施磷条件下的生产力和纤维质量. 实验设计是随机分组的，以分割区和四次重复的方式安排治疗. 五个磷剂量分配在主地块，四个棉花品种分配在次地块. 对每次农业收获中评估的特征进行方差分析. Tukey检验用于比较品种和农业收成的平均值. 磷有效性的提高提高了天然彩色棉花品种的生产力和纤维质量. 最大纤维产量为240; 240; 199.11和60 kg ha-1。BRS Verde品种的最大纤维长度达到80.86 kg ha-1. 138.49 kg ha-1获得了最大的均匀性，品种BRS Topázio获得了更大的均匀性. 纤维强度随着P2O5的应用而增加.

KEYWORDS:

• Gossypium hirsutum L.
• cultivar
• phosphate fertilization
• micronaire. resistance
• elongation

关键词:

• Gossypium hirsutum. L
• 栽培品种
• 磷肥
• 马克隆. 反对
• 伸长率

Highlights

• The productivity and fiber quality of the cotton cultivars responded differently to P.

• The highest concentration of P increased the yield and quality of the colored cotton fiber;

• Cultivar BRS Topázio showed better responses for the characteristics analyzed;

• Fiber length, strength and elongation can be increased with rates of P.

Disclosure statement

No potential conflict of interest was reported by the authors.