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首页> 外文期刊>Agricultural Water Management >Water uptake and WUE of Apple tree-Corn Agroforestry in the Loess hilly region of China
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Water uptake and WUE of Apple tree-Corn Agroforestry in the Loess hilly region of China

机译：中国黄土丘陵地区苹果树玉米玉米玉米玉石农业品

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摘要

Agroforestry of fruit tree-crops are widely used in the ecological construction of returning farmland to forestry in the Loess Plateau area, but disagreement persists over the water relationship between fruit tree and crops. To explore the rationality of fruit tree and crop intercropping, the stable isotopes were used to investigate the water sources of apple trees and corn in apple tree monoculture (A), corn monoculture (C) and apple-corn combination (AC), and the WUE of vegetation. The results indicated that the water source of apple tree was not significantly different between A and AC, though the utilization of water sources of corn in C was higher than that of AC. The layers of 60 - 80 cm (20.9-25.9 %) and 80 -100 cm (22.8-24.7 %) were the major water source of the apple tree, while the corn also had two fixed water sources of 20 - 40 cm (18.8-33.1 %) and 40 - 60 cm (20.6-33.7 %) during the growth period. In addition, the apple tree mainly absorbed water from 40 - 60 cm (21.8-24.9 %) in the early and middle growth stages and from 100 - 200 cm (19.7-21.1 %) the in late growth stages. The corn predominantly used water from 0 - 20 cm (20.5-26.4 %) in the early growth stages and from 60 - 80 cm (17.2-42.5 %) in the middle and late growth stages. This indicates that there were competitions for water sources at 40 - 80 cm between apple tree and corn during the growth season. The water use efficiency (WUE) indicated that compound planting can improve the WUE of apple tree and corn. The WUE of corn in compound planting was 3.03-5.26 % higher than that of monoculture, though the WUE of apple trees in combination was higher than that of monoculture only when the soil water content was low. To achieve better ecological and economic benefits, 40 - 80 cm should be frequently sub-irrigated in the compound of apple tree and corn.
机译：果树农作物的农业剧广泛应用于黄土高原地区回归农田的生态建设，但在果树和作物之间的水关系中存在分歧。为了探讨果树和作物间作的合理性，稳定的同位素用于研究苹果树和玉米的水源，在苹果树单殖民（A），玉米单一栽培（C）和苹果玉米组合（AC）中，以及植被的wue。结果表明，A和AC之间的苹果树水源没有显着差异，尽管C玉米的水源的利用高于AC的水源。 60-80厘米（20.9-25.9％）和80 -100厘米（22.8-24.7％）的层是苹果树的主要水源，而玉米还有两个固定水源20 - 40厘米（18.8在生长期期间-33.1％）和40-60厘米（20.6-33.7％）。此外，苹果树主要吸收早期和中间生长阶段的40-60厘米（21.8-24.9％）和100-200厘米（19.7-21.1％）的晚期生长阶段。玉米主要在早期生长阶段中使用0-20厘米（20.5-26.4％）和中期生长阶段的60-80厘米（17.2-42.5％）。这表明在成长季节期间，苹果树和玉米之间的40-80厘米有水源的竞争。水使用效率（WUE）表明复合种植可以改善苹果树和玉米的WUE。玉米的WUE在化合物种植中高于单一栽培的3.03-5.26％，尽管当土壤含水量低时，苹果树的WUE才高于单一种植体。为了实现更好的生态和经济效益，40-80厘米应在苹果树和玉米的化合物中经常灌溉。

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