农艺措施对紫花苜蓿种子产量组分的影响

以‘甘农6号’紫花苜蓿为试验材料，研究施肥（磷肥）、灌溉和种植密度3种农艺措施对紫花苜蓿种子产量组分和产量的影响。结果表明，在施肥处理下，紫花苜蓿单位面积生殖枝数与种子产量关联性最大；在灌溉处理下，紫花苜蓿每花序小花数与种子产量关联性最大；在密度处理下，每花序荚果数与种子产量的关联性最大。宁夏盐池地区紫花苜蓿种子生产，可在现蕾期和盛花期适当灌溉675 m³·hm^-2；施磷肥180 kg·hm^-2作为底肥，在种植第2年至第4年种子总产量达1 228.02 kg·hm^-2；种植密度控制行距为60 cm，株距为30 cm，在种植第2年至第4年种子总产量达1 882.17 kg·hm^-2。

Effects of Agronomic Measures on Seed Yield Components of Alfalfa

Seed yield components are the direct factors affecting seed yield of alfalfa. In this experiment, ‘Gannong No.6’ alfalfa was used as the experimental material to study the effects of fertilization (phosphate fertilizer),irrigation,planting density on the yield components and yield of alfalfa seeds. The result showed that under the fertilization treatment,the number of shoots per unit area of alfalfa had the greatest correlation with the seed yield;under the irrigation treatment,the number of alfalfa flowers per inflorescence had the greatest correlation with the seed yield;under the density treatment,the number of small pods per inflorescence had the greatest correlation. For the production of alfalfa seeds in Yanchi,Ningxia,properly irrigate 675 m³·hm^-2 during budding and blooming periods. Apply 180 kg·hm^-2 of phosphate fertilizer as base fertilizer, the total seed yield can reach 1 228.02 kg·hm^-2 from the second to the fourth year of planting. The planting density is controlled at a between row of 60 cm and the within row is 30 cm, the total seed yield from the second to the fourth year is 1 882.17 kg·hm^-2.