水肥对主干结果型灰枣叶片养分含量的影响

Effects of Water and Fertilizer on the Nutrient Content in the Leaves of Trunk Fruit Type Grey Jujube

以六年生主干结果型灰枣为试材,采用单因素随机区组试验设计,研究了在不同水肥用量的前提下主干结果型灰枣在不同生育期内叶片全氮和全磷含量的变化,以期得到适合主干结果型灰枣生长的水肥用量。结果表明:施肥和水分处理的枣树多年生二次枝枣吊叶片与一年生二次枝枣吊叶片中全氮、全磷含量均在花期最高,在完熟期时含量下降至最低,其中N3(495.0 kg·hm^(-2))、P3(435.0 kg·hm^(-2))、W4(787.5 m^(3)·hm^(-2))处理与其它处理间存在显著差异,其中N3处理全氮含量较其它氮肥处理最高可增加30%,P3全磷含量较其它磷肥处理可增加96%,W4处理全氮含量较其它滴灌处理最高可增加37%,全磷含量较其它滴灌处理最高可增加80%。

Taking the six-year-old trunk fruit type grey jujube as the experimental material,the changes of total nitrogen and total phosphorus content of leaves in different growth periods of trunk fruit type grey jujube under the premise of different water and fertilizer dosage were studied by using single factor randomized trial,and in order to obtain the suitable water and fertilizer dosage for the growth of the trunk fruit type grey jujube.The results showed that the contents of total nitrogen and total phosphorus in the leaves of perennial secondary jujube hanging leaves and annual secondary jujube hanging leaves treated with fertilization and water treatment were the highest at the flowering stage,and the content decreased to the lowest at the completion stage,among which there were significant differences between N(495.0 kg·hm^(-2)),P(435.0 kg·hm^(-2)),W4(787.5 m².hm^(-2))treatments and other treatments,and the total nitrogen content of Ns treatment could be increased by up to 30%compared with other nitrogen fertilizer treatments.The total phosphorus content of Ps could be increased by 96%compared with other phosphate fertilizer treatments,the total nitrogen content of W4 treatment could be increased by up to 37%compared with other drip irrigation treatments,and the total phosphorus content could be increased by up to 80%compared with other drip irrigation treatments.