不同灌溉量对土壤理化性质及水稻生长发育的影响

水分是水稻正常生长发育的关键因素之一,【目的】研究不同灌溉量对黄河滩重构土体理化性质及水稻生长发育的影响。【方法】2017年以"吉宏6号"为试验材料,设计4个灌溉量处理,即:高水W1(120%ET0)、适水W2(100%ET0)、节水W3(80%ET0),低水W4处理(60%ET0),分析了不同灌溉量对土壤理化性质,水稻生长发育、产量的影响。【结果】土壤理化性质,水稻生长发育及产量受不同灌溉量影响显著,随着灌溉量的增加,水稻收获后土壤pH值、电导率以及土壤养分残留量也逐渐减降低。当灌溉量降低到80%ET0,水稻单株株高、分蘖数及产量都有明显降低,水稻生长发育受到一定影响,另外从高水W1处理(120%ET0)到低水W4处理(60%ET0)的水稻产量看出,随着灌溉量的增大,水稻产量呈现出先升高后降低的趋势。【结论】韩城下峪口土地整治项目区水稻种植适宜参考试验W2处理的灌溉量。

Effects of Different Irrigation Amount on Reconstructing Soil Physical and Chemical Properties and Rice Growth

【 Objective 】 The purpose of this paper is to study the effects of different irrigation amounts on the physical and chemical properties of reconstructed soil and the growth of rice in the Yellow River Beach.【Method】In April 2017, In Jihong 6 was used as experimental material to design different irrigation treatments, including high water W1(120% ET0), suitable water W2(100% ET0), water saving W3(80% ET0), and low water W4(60% ET0).The effects of different irrigation amount on soil pH valueysical and chemical properties, rice growth and yield were studied and analyzed. 【Result】The pH value physical and chemical properties of soil, the growth and yield of rice were significantly affected by different irrigation amounts. With the increase of irrigation amount, soil pH value,electrical conductivity and soil nutrient residues also decreased gradually after rice harvest. When the irrigation amount was reduced to 80% ET0, the plant height, tiller number and yield of rice were significantly reduced, and the growth and development of rice were affected to some extent. In addition, the rice yield of each treatment showed that the rice yield showed a trend of first increasing and then decreasing with the increase of irrigation. 【Conclusion】Rice planting in Xiayukou land improvement project area of Hancheng is suitable for referring to the irrigation amount of W2.