果园间作粒用豇豆播期与密度试验研究

Sowing Time and Density of Intercropping Grain Cowpea in Orchard

为了研究果园间作条件下,不同播期和密度对粒用豇豆产量和主要性状的影响,本试验以粒用豇豆‘辽地豇2号’为材料,在3年生大榛子果园内,采用间作形式,进行比较试验。试验采用裂区设计,分别以播期和密度为主因素和副因素,研究比较粒用豇豆的籽粒产量和主要性状表现。结果表明:果园间作条件下,播期和密度对‘辽地豇2号’的产量和主要性状的影响分别达到了显著和极显著水平;播期和密度单因素对产量的影响呈抛物线型分布。相关分析表明:百粒重与单株产量呈弱负相关,其余各性状间皆为显著正相关;产量与百粒重、主茎节数呈负相关,与单株荚数呈弱正相关,与主茎分枝数和单株粒重成正相关。果园间作条件下,粒用豇豆在辽宁地区的适宜播期为5月29日,适宜密度16.5万株/hm^2。

To study the influence of different sowing times and densities on the yield and main characters ofgrain cowpea in orchard intercropping conditions, grain cowpea cultivar—‘Liao Ground Cowpea No.2＇ wasused as material, a comparative test was conducted by intercropping cowpea in 3-year old cobnut orchard. Thesplit plot was designed, sowing time and density were used as main factor and side factor, grain yield and maincharacters of cowpea were studied and compared. The results showed that when intercropping in orchard, theinfluence of sowing time and density on yield and main characters was significant and extremely significant,respectively; the influence of single factor on grain yield was parabolic distribution. Correlation analysisshowed that there was a weakly negative correlation between 100 grain weight and yield per plant, the othercharacters were significantly and positively correlated with each other; yield was negatively correlated with 100 grain weight and the number of stem node, weakly positive correlated with the number of pods per plant,positively correlated with the branch number and grain weight per plant. The conclusion was that whenintercropping grain cowpea in orchards in Liaoning, the suitable sowing time was May 29^th with a suitabledensity of 16.5×10^4 plants/hm^2.