灌溉强度与作物吸收率关系探讨

Research on Relation between Irrigation Intensity and Crop Absorption Ratio

随着节水灌溉技术的推广,灌溉效果应该被给予更多重视,然而,灌溉强度与作物吸收率之间的关系尚未明确。通过模拟6种不同灌溉强度下土壤水运移及源汇项变化情况,证实灌溉强度的确影响着作物吸收率,并获得灌溉强度与作物吸收率的拟合曲线。说明制定合理的灌溉强度可以有效地提高根系吸水量,减少水分损耗(蒸发和渗漏量),达到真实节水的目的。另一方面,可以使用作物吸收率作为制定灌溉强度的理论指标。

With the promotion of water saving irrigation technology, the irrigation effect should be paid more attention. While the relation between irrigation intensity and crop absorption ratio is not clear at present. According to the simulation result of soil moisture movement and change of source-sink items under the conditions of six different irrigation intensities, this paper proved that the irrigation intensity surely influenced the crop absorption ratio. The relation curve between them was obtained, too. The research result indicated that rational irrigation intensity could enhance the crop absorb ratio and reduce water loss effectively. On the other hand, the crop absorb ratio can be taken as an index to decide irrigation intensity.