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首页> 外文期刊>Acta Horticulturae >Water productivity of peach for processing in a soil with low available water holding capacity.
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Water productivity of peach for processing in a soil with low available water holding capacity.

机译：桃在水分保持能力低的土壤中加工的水分生产率。

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摘要

Different irrigation and nitrogen management strategies have been applied to meet industry requirements and farmers' goals. A four-year field experiment (2006-2009) was conducted in a commercial peach orchard. Three irrigation strategies were evaluated according to fruit growth stages: full irrigation throughout the growing season to match crop evapotranspiration (ETc), regulated deficit irrigation (RDI) during stage II (30% ETc) and RDI during stage III (70% ETc). These were combined with three nitrogen strategies: 0, 60 and 120 kg N ha-1. The peach cultivar was 'Andross' on GF305 rootstock at 5x2.8 m planted in 1999. The soil type was a shallow, well-drained, loam which had a petrocalcic horizon within 45 cm of the soil surface (Petrocalcic Calcixerepts). The total available water holding capacity was 41 mm. RDI applied in stages II and III increased water productivity (WP) and fruit soluble solids concentration (SSC). The highest WP was found in 2007 (17.5 kg dry matter fruit ha-1 mm-1 of irrigation water+effective precipitation), while 2006 produced fruits with the highest SSC (12.5%). The interaction effects of nitrogen and irrigation were significant for WP and SSC. The highest WP was obtained with 60 kg N ha-1 and when irrigation was restricted during stage III. Moderate N application (60 kg N ha-1) produced the maximum WP and yield but did not affect SSC.
机译：已采用不同的灌溉和氮肥管理策略来满足行业要求和农民的目标。在商业桃园进行了为期四年的田间试验（2006-2009年）。根据水果的生长阶段，评估了三种灌溉策略：在整个生长期进行完全灌溉以匹配作物的蒸散量（ET c ），在第二阶段进行调节性亏缺灌溉（RDI）（30％ET c ）和第3阶段的RDI（70％ET c ）。将这些与三种氮肥策略结合：0、60和120 kg N ha -1 。桃品种是1999年种植的GF305砧木上的'Andross'，长5x2.8 m。土壤类型是一种排水良好的浅层壤土，在土壤表面45 cm内有一个钙化层位（Petrocalcic Calcixerepts）。总可用持水量为41毫米。在第II阶段和第III阶段应用RDI可提高水生产率（WP）和水果可溶性固形物浓度（SSC）。在2007年发现最高的WP（17.5千克干物质水果ha -1 mm -1 灌溉水+有效降水），而2006年生产的SSC最高（ 12.5％）。氮与灌溉的交互作用对WP和SSC具有显着影响。在第三阶段灌溉受到限制时，最高的WP是在60 kg N ha -1 下获得的。施氮量适中（60 kg N ha -1 ）产生最大的WP和产量，但不影响SSC。

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