施磷水平对胡麻干物质积累与产量的影响

Effects of Different Phosphorus Application Levels on Dry Matter Accumulation and Yield of Flax

采用单因素随机区组试验设计,在胡麻播种前底施磷肥,设施磷量0（不施,CK）、33.75、67.50、101.25 kg/hm2计4个处理,研究不同施磷水平对胡麻干物质积累及产量的影响,以明确胡麻栽培的最佳施磷量。结果表明：不同施磷水平下胡麻干物质积累量均随生育进程的推进呈＂S＂型增长趋势,底施磷肥可有效增加胡麻地上部干物质积累量和产量;促进胡麻苗期～现蕾期叶片的生长,盛花期茎秆的生长,以及青果期和成熟期单株粒重及蒴果数的增加。本研究条件下磷肥的最佳施用量为67.5 kg/hm2,在该施磷水平下,胡麻地上干物质积累最多,产量最高（2 296.15 kg/hm2）,且最有利于干物质在各器官的分配。

Using phosphate fertilizer as base fertilizer before sowing,in a way of single factor randomized block design,including four phosphorus application amounts with 0 kg / hm2（ CK）,33. 75 kg /hm2,67. 50 kg /hm2,101. 25 kg / hm2,the effects of different levels of phosphorus on dry matter accumulation and yield of flax were studied,in order to discuss best phosphorus fertilizing amount of flax cultivation. The results showed that under different phosphorus levels flax growing trend of dry matter accumulation showed S type. Phosphorus fertilizing could significantly increase the dry matter accumulation in the aboveground and yield,improve the flax leaf growth from seedling stage to squaring stage,stem growth in full-bloom stage,the increase of sinyle grain yield and capsule in young fruit stage and maturing stage. The best content of phosphorus fertilizer was 67. 50 kg / hm2 under this condition,the dry matter accumulation and yield（ 2 296. 15 kg / hm2） all reached maximum value and it was most beneficial to dry matter distribution proportion in different organs.