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首页> 外文期刊>Revista Caatinga >IMPACT OF SALINE CONDITIONS AND NITROGEN FERTILIZATION ON CITRUS PRODUCTION AND GAS EXCHANGES
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IMPACT OF SALINE CONDITIONS AND NITROGEN FERTILIZATION ON CITRUS PRODUCTION AND GAS EXCHANGES

机译：盐分和氮肥对柑橘生产和气体交换的影响

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In two simultaneous experiments, we evaluated the impact of brackish irrigation water and nitrogen (N) fertilization on the production of citrus (scion-rootstock combinations) and its associated gas exchanges. These experiments were conducted at the Campus of Federal University of Campina Grande, Brazil in a protected environment (shade screens on the sides) using drainage lysimeters. Experiment I used a randomized block design (3 replicates), in a 5 × 3 factorial arrangement, corresponding to five water salinity levels (0.6, 1.2, 1.8, 2.4, and 3.0 dS m-1) and three scion-rootstock combinations: RS1– Common Sunki mandarin (TSKC) × Poncirus trifoliata English (TRENG) - 256; RS2– Common Rangpur lime (LCRSTC); and RS3– TSKC × (Rangpur lime (LCR) × P. trifoliata (TR)) - 059; with Mimo do Céu orange as the scion variety. Experiment II used a randomized block design (3 replicates), in a 3 × 2 factorial arrangement, corresponding to the three scion/rootstock combinations and two nitrogen (N) doses (100 and 200 mg kg-1 of soil). Plants were irrigated with water of 3.0 dS m-1. For both experiments, gas exchanges and mean mass of fruits were evaluated at harvest. Gas exchanges were inhibited in plants under saline stress. Plants grafted with Common Rangpur lime showed greater production potential than did the other genotypes studied, even under brackish water conditions.
机译：在两个同时进行的实验中，我们评估了微咸灌溉水和氮（N）的施肥对柑橘产量（接穗－砧木组合）及其相关气体交换的影响。这些实验是在巴西坎皮纳格兰德联邦大学的校园内，在一个受保护的环境中（侧面的遮阳板）使用排水测渗仪进行的。实验一采用5×3因数排列的随机区组设计（3次重复），对应于五个水盐度水平（0.6、1.2、1.8、2.4和3.0 dS m-1）和三个接穗砧木组合：RS1 –普通Sunki普通话（TSKC）×Poncirus trifoliata英文（TRENG）-256; RS2 –普通朗布尔石灰（LCRSTC）;和RS3–TSKC×（朗普尔石灰（LCR）×三角假单胞菌（TR））-059;以Mimo doCéu橙色作为接穗品种。实验II采用3×2因子排列的随机区组设计（3个重复），对应于3个接穗/砧木组合和2个氮（N）剂量（土壤100和200 mg kg-1）。用3.0 dS m-1的水灌溉植物。对于这两个实验，在收获时都评估了气体交换和水果的平均质量。在盐胁迫下植物中的气体交换被抑制。即使在微咸水条件下，嫁接普通兰普尔石灰的植物也显示出比其他研究的基因型更大的生产潜力。

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