The effects of different diameter water retaining agents on soil moisture and oat growth were studied with oat Baiyan 2 as materials.The results showed that the different diameter water retaining agent could improve soil moisture content in 0-105 cm soil layer,and the difference between 15-65 cm soil layers was obvious.The application of water retaining agent could increase the spike number,grain number per panicle and 1 000-grain quality,and finally increase the yield of oats,the yield of big and small diameter water retaining agent increased by 12.66％ and 16.83％,respectively,compared with control.Big and small diameter water retaining agent could improve obviously oats water use efficiency,increase 15.18％ and 23.67％,respectively,compared with the controls.The result shows that small diameter water retaining agent in improving soil moisture and oat growth than large diameter water retention agent effect is remarkable.%以燕麦白燕2号为材料,初步探讨不同直径保水剂对土壤水分及燕麦生长的影响.结果表明,不同直径保水剂都能提高0 ～ 105 cm土层土壤质量含水量,其中,15 ～ 65 cm各土层处理差异明显;施用保水剂能提高燕麦穗数、穗粒数和千粒质量,最终提高燕麦产量,大小直径保水剂比对照分别增产12.66％和16.83％;大小直径保水剂都能明显提高燕麦水分利用率,分别比对照增加15.18％和23.67％.表明小直径保水剂在提高土壤水分和影响燕麦生长方面比大直径保水剂效果显著.
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