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研究紫花苜蓿品种在各地的生产表现是品种鉴定和推广的重要工作之一。本文调查了北京市顺义区河南村乡紫花苜蓿(WL323)人工草地连续3年的产量、土壤水分和土壤养分含量的变化动态。结果表明:刈割产量动态年内随茬次下降,年产量整体上呈下降趋势,株高和总茎数波动变化,整体趋势不明显;而土壤水分含量变化与产量变化趋势一致;同时,0～20cm土层的速效氮含量波动升高。说明了WL323的土壤改良能力较强,而实际生产中必需保证及时灌溉。
Research on alfalfa varieties in different parts of the production performance is one of the important work of variety identification and promotion. This paper investigates the dynamics of yield, soil moisture and soil nutrient content of alfalfa (WL323) artificial grassland in Henan village of Shunyi District in Beijing for three consecutive years. The results showed that: the yield of mowing decreased with the decreasing of stubble during the year, the annual yield decreased, the plant height and total stem number fluctuated, the overall trend was not obvious; while the change of soil moisture content was consistent with that of yield; 20cm soil available nitrogen content fluctuations. It shows that WL323 has stronger ability of soil improvement, but the actual production must ensure timely irrigation.