分期播种对日光温室板蓝根生长发育、产量及品质的影响

Effect of Staggered Sowing on the Growth,Yield and Quality of Isatis tinctoria in Solar Greenhouse

为研究分期播种对日光温室板蓝根生长发育、产量及品质的影响,采用随机区组试验设计,测定不同播种期下板蓝根苗期和定植后的生长指标、定植后的产量及品质。结果表明:随着播种期的推迟,板蓝根出苗时间相应提前,全生育期逐渐缩短而后又延长,苗期及植株各项生长指标总体呈下降趋势,维生素C、可溶性糖、有机酸质量比均有所下降。试验得出,宁夏地区板蓝根设施栽培的最佳播种期为4月中下旬—5月中下旬,最佳定植期为6月上旬—7月上旬,5月20日播种的板蓝根产量高,经济效益高。

In order to investigate the influences of staggered sowing on the growth,yield,and quality of Isatis tinctoria in solar greenhouses,a randomized block experiment design was used to measure growth indicators during the seedling stage and after transplanting,as well as the yield and quality after transplanting,across different sowing dates.The results showed that with the postponement of the sowing date,the emergence time of I.tinctoria advanced accordingly,the total growing period first decreased and then increased,and the growth indicators of both the seedling stage and the plant generally showed a declining trend.The mass ratios of vitamin C,soluble sugar,and organic acids all decreased.The experiments concluded that the optimal sowing period for the facility cultivation of I.tinctoria in Ningxia is from mid-late April to mid-late May,and the best transplanting time is from early June to early July.The highest yield and the best economic benefit were achieved with the sowing treatment on May 20th.