Organic fertilization to attenuate water salinity effect on papaya growth

ABSTRACT The salinity of water and soil reduces the growth and production of crops, especially the fruit trees, such as papaya. Thus, it is necessary to obtain management alternatives for cultivation under these conditions. Therefore, the objective of this study was to evaluate the growth and phytomass of papaya cultivated under irrigation with saline water and organic fertilization. An experiment was set up using a randomized block design, with the treatments distributed in a 5 x 2 factorial scheme, consisting of five levels of salinity of irrigation water (0.6, 1.2, 1.8, 2.4 and 3.0 dS m-1) and two levels of organic fertilization (10 and 20 L of bovine manure per plant), with three replications, totaling thirty experimental plots. Growth variables of papaya were evaluated. Papaya plants were negatively affected by irrigation water salinity, with a greater effect on the number of leaves and on dry phytomass of leaves, with no effect of bovine manure levels.

摘要 水土盐渍化会抑制作物的生长与产量，对番木瓜等果树的影响尤为突出。因此，在盐碱胁迫环境下开展作物种植，亟需探索可行的栽培管理途径。为此，本研究旨在评估咸水灌溉配施有机肥条件下番木瓜的生长状况与植物生物量。本实验采用随机区组设计，以5×2析因试验方案布置处理：设置5个灌溉水盐度梯度（0.6、1.2、1.8、2.4及3.0 dS·m⁻¹）与2个有机肥施加水平（每株施加10 L与20 L牛粪），每组处理设置3次重复，共计30个实验小区。本研究测定了番木瓜的多项生长指标。番木瓜植株会受到灌溉水盐度的负面影响，其中叶片数量与叶片干生物量受抑制程度最为显著，而牛粪施加水平未对其产生显著影响。