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Study of Water-demand Regulations and Coupling Degree of Water Requirement and Precipitation of Water-Saving Rice Cultivation Patterns

机译：水稻节水栽培方式的需水规律与需水耦合度研究

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摘要

Study of water-demand regulations and coupling degree of water requirement and precipitation under condition of different water-saving rice cultivation patterns were carried out by field-scale experiments. The results showed that the evapotranspiration of rice or rape reduced by a wide margin, the water requirement and requirement intensity of every stage changed greatly for the growth regulation function and compensation effect to crop of water-saving rice cultivation patterns. The new water requirement rules of water-saving rice cultivation patterns were formed. The water requirement intensities of the water-saving irrigation double cropping rice pattern, the double cropping rice pattern of flood-drought cultivation, and water-saving rice cultivation pattern of rice and rape rotation were 0.76 mm/d, 1.15 mm/d and 0.71 mm/d lower than those of the conventional double cropping rice pattern, respectively. The coupling degree of water requirement and precipitation of the water-saving irrigation double cropping rice pattern, the double cropping rice pattern of flood-drought cultivation, and water-saving rice cultivation pattern of rice and rape rotation was 12.62%, 27.76% and 0% higher than that of the conventional double cropping rice pattern.
机译：通过田间规模试验，研究了不同节水水稻栽培方式条件下的需水规律，需水与降水的耦合程度。结果表明，水稻或油菜的蒸散量有较大幅度的减少，各阶段的需水量和需水量变化很大，对节水水稻的生长调节功能和对作物的补偿作用具有重要的调节作用。形成了节水水稻栽培方式的新需水规律。节水灌溉双季稻模式，旱作双季稻模式以及水稻和油菜轮作的节水水稻栽培模式的需水强度分别为0.76 mm / d，1.15 mm / d和0.71。 mm / d分别低于传统的双季稻模式。节水灌溉双季稻，旱作双季稻，水稻和油菜轮作的节水栽培模式的需水与降水的耦合度分别为12.62％，27.76％和0。比常规的双季稻模式高％。

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