不同水肥浓度对涌泉根灌枣树叶面积和产量的影响

以陕西榆林山地矮化密植梨枣树为研究对象,分析了不同水肥浓度对涌泉根灌枣树生育期内叶面积指数、果实发育和产量的影响。结果表明,不同水肥处理叶面积指数在枣树果实膨大期达到高峰,且稳定持续至果实成熟期末期,随后叶面积指数开始下降。叶面积指数随着萌芽展叶期灌水量的增加而增加,所有水肥处理下,枣数叶面积指数最大的是高水中肥处理(W1N2)；所有处理中,高水、低水处理与低肥相组合,果实体积最大,中灌水处理为不施肥时果实的体积最大。单位枝长的果实数目最高的是中水中肥处理(W2N2),最低的是低水处理(W3),在一定范围内,适当施肥能促进枣果单位枝长的果实数目的增加,但肥液浓度过大,反而会抑制其增加。在一定条件下,所有处理中产量最高的是中水中肥处理(W2N2),产量超过2000kg/亩,最低的是低水高肥处理(W3N1),产量不到1000kg/亩。因此可以选择中水中肥处理(W2N2),能获得最高的产量。

Effects of Different Water and Fertilizer Concentrations on the Leaf Area and Yield of Bubbled-root irrigation

Taking the dwarf and densely planted pear jujube tree in Yulin mountainous area of Shaanxi Province as the research object, the effects of different water and fertilizer concentrations on the leaf area index, fruit development and yield of jujube trees in bubbled-root irrigation during the growth period were analyzed. The results showed that the leaf area index of different water and fertilizer reached a peak at the fruit enlargement stage of the jujube tree, and remained stable until the end of fruit ripening period, and then the leaf area index began to decline. The leaf area index increased with the increase of irrigation water during the leafing stage. Under all water and fertilizer treatments, the highest leaf area index was the high water fertilizer treatment (W1N2); in all treatments, high water, low water treatment and low fertilizer In combination, the fruit volume is the largest, and the volume of the fruit is the maximum when the irrigation treatment is not applied. The highest number of fruit per unit of long stem was treated with W2N2 and the lowest was with low water treatment (W3). Within a certain range, appropriate fertilization could promote the increase in the number of fruit per unit of fruit branch length, but the fertilizer solution If the concentration is too large, it will inhibit its increase. Under certain conditions, the highest yield of all treatments was in the middle water fertilizer treatment (W2N2), the output was over 2000kg/mu, the lowest was the low water and high fertilizer treatment (W3N1), and the output was less than 1000kg/mu. Therefore, it is possible to select medium water treatment (W2N2) and obtain the highest yield.