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针对辽西地区土壤耕层变浅和秸秆浅旋还田造成的土壤漏风跑墒等问题,实施秸秆机械化深层还田与常规耕作(CK)对比试验,测定玉米根系生长状况。结果表明,秸秆深层还田能够增强玉米扎根性能,扩展根系分布空间,扎根深度增加5~10 cm,根系分布空间扩大6 000(初生节根)~154 500(次生根)cm3;秸秆深层还田的次生根数目明显高于CK,且CK根系主要分布在10~20 cm土层深度,秸秆深松还田处理根系则集中分布在21~30 cm土层深度;秸秆深层还田处理与CK相比玉米产量提高18.16%,差异显著。
In order to solve the problem of soil wind leakage and soil moisture caused by the shallow soil plowing in the western Liaoning and straw returning, the root growth of maize was determined by mechanized deep straw returning and conventional tillage (CK) experiments. The results showed that deep straw returning could increase the rooting ability of corn and extend the root distribution space. Root depth increased by 5 ~ 10 cm and root distribution increased by 6 000 (primary rooting) to 154 500 (secondary root) cm 3. The number of secondary roots was significantly higher than that of CK, and the root system of CK was mainly distributed in the depth of 10 ~ 20 cm. The root system of deep straw returning to straw was concentrated in the depth of 21 ~ 30 cm soil depth. Compared with the corn yield increased 18.16%, the difference was significant.