种植密度对饲用小黑麦、饲用黑麦种子生产性能的影响

为了明确饲用小黑麦(×Triticale Wittmack)和饲用黑麦(Secale cereale)在河北平原农区种子生产时的最佳种植密度,2014-2016年连续两年在河北省衡水市护驾迟镇设置每公顷60万、110万、160万、210万、260万和310万株的种植密度,探究其对饲用小黑麦和饲用黑麦种子生产性能的影响。结果表明,种植密度对饲用小黑麦和饲用黑麦种子生产影响较大,在不同种植密度下饲用小黑麦和饲用黑麦种子产量、亩穗数、穗粒数、千粒重差异显著,倒伏性差异明显。在河北平原农区10月中上旬播种,饲用小黑麦和饲用黑麦种子生产适宜种植密度均为每公顷110万株基本苗,相同条件下饲用黑麦可比饲用小黑麦适当减少播量,此时饲用小黑麦和饲用黑麦种子产量高,饲用小黑麦种子产量达到每公顷4 300kg以上,饲用黑麦种子产量达到每公顷3 900kg以上;倒伏轻,千粒重高,种子饱满,商品性好。

Effect of planting density on ×Triticale Wittmack and Secale cereale seed productivity

To determine the optimal planting density for ×Triticale Wittmack and Secale cereale seed productivity in the Hebei Plain Farming Area, the effect of planting density was studied at Hujiachi Town, in Hengshui city, Hebei Province during 2014-2016.The results indicated that planting density significantly affected ×Triticale Wittmack and Secale cereale seed production in various ways: seed yield, heading rate, kernel number per spike, thousand-seed weight and susceptibility to lodging.The optimal planting density of ×Triticale Wittmack and Secale cereale was 1.1 million·ha-1 basic seedling in October on the Hebei plain, and it would be appropriate to sow less S.cereale when planted alone under the same conditions.Under optimal seeding density, the seed yield of ×Triticale Wittmack was more than 4 300 kg·ha-1 and the seed yield of S.cereale was more than 3 900 kg·ha-1;and both species showed good performance with light lodging, high thousand-seed weight, full seed, and good commodity.