求翻译：摘要：本文通过对不同灌溉方式对苜蓿地下部分生长的影响，找出适时、适量的灌溉制度，来合理利用水资源，为苜蓿的产业化提供重要依据。试验采用漫灌、喷灌、滴灌三种主要方式，滴灌设有不同间距及滴头流量。试验研究表明：不同灌溉方式对土壤相对含水量的有较大的影响；根的向水性运动，使根在不同灌溉方式下长度不同；不同的灌溉方式对苜蓿的主根深度影响不明显，主要影响侧根的分布；灌水是直接可以影响草产量的因素。是什么意思？

Abstract: In this paper, the influence of different irrigation methods on the part of the growth of alfalfa underground to find timely, adequate irrigation system, rational utilization of water resources, provide an important basis for the industrialization of the alfalfa. The test flood irrigation,

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Summary: this article through the influence of different irrigation methods on the growth of alfalfa underground part, find timely, adequate irrigation systems, rational use of water resources, provides an important basis for alfalfa industrialization. Three main tests using flood irrigation, sprink

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