吉林西部地区不同品种、 施肥配比和种植密度对苜蓿产量的影响. (Chinese)

The experiment explored the alfalfa planting technology scheme suitable for western Jilin. From 2013 to 2016, 15 different alfalfa varieties were evaluated, and then the fertilization ratio and density control test of Gongnong 5 were carried out from 2017 to 2020. The fertilization ratio test was designed by '3414' scheme. The density control experiment was divided into three groups, each group included two experimental factors, namely sowing row spacing and sowing quantity. Sowing row spacing was 15, 30, 45 cm and sowing, the sowing rate was 7.5, 12.5, 17.5 and 22.5 kg/hm². The results showed that the high yield of Gongnong No.5 was obtained continuously in the second, third and fourth years of planting, and the average hay yield reached 21 849.27 kg/hm² in three years. The high and stable yield can be popularized in the region. Gongnong No. 5 had a large demand for nitrogen fertilizer in early stage of planting, and the demand decreased with the increase of years, but the demand for phosphorus and potassium fertilizer increased. Comprehensive four year yield, treatment 7 (N2P3K2) performed best. Gongnong 5 could obtain high yield under the conditions of 15 cm row spacing and 12.5 kg/hm² seeding rate in the first three years of planting. The experiment indicates that Gongnong No.5 alfalfa variety was selected with row spacing of 15 cm and sowing amount of 12.5 kg/hm², nitrogen fertilizer 100 kg/hm², phosphorus fertilizer 225 kg/hm², potassium fertilizer 100 kg/hm². [ABSTRACT FROM AUTHOR]

试验探寻适合吉林西部地区的苜蓿种植技术方案。试验于2013 年至2016 年对15 个不同苜蓿品种进 行评价, 筛选得到公农5 号;并于2017 年至2020 年进行施肥配比和密度调控试验, 对产量进行评价。施肥配比试 验采用"3414"方案设计, 密度调控试验设置3 个区组, 每个区组包括2 个试验因素, 即播种行距和播种量。播 种行距分别为15、30、45 cm 以及撒播;播种量为：7.5、12.5、17.5 和22.5 kg/hm²。结果显示, 公农5 号在种植第 2 年、第3 年、第4 年连续获得高产, 3 年平均干草产量达21 849.27 kg/hm², 产量高且稳定。建植初期公农5 号对 氮肥需求量较大, 随着年限的增加需求量减少, 对磷肥和钾肥的需求量随年份增加;综合4 年产量, 处理7 （N2P3K2） 表现最佳。公农5 号种植前3 年在行距15 cm 和播种量12.5 kg/hm²条件下获得高产。研究表明, 选择公 农5 号苜蓿品种, 行距15 cm, 播种量12.5 kg/hm², 施氮肥100 kg/hm²、磷肥225 kg/hm²、钾肥100 kg/hm²。. [ABSTRACT FROM AUTHOR]

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