种植密度和施肥水平对龙黑果蔗产量的影响

本研究采用单因素随机区组试验方法探讨了种植密度和施肥水平对龙黑果蔗产量及其构成因素的影响。结果表明,龙黑果蔗生产最佳,种植密度和施肥水平为:种植密度4.5-5.0段·m-1双芽苗,有效茎4.35-4.95万株·hm-2;施纯N787.5 kg·hm-2、纯P 787.5 kg·hm-2、纯K 787.5 kg·hm-2、有机肥4500 kg·hm-2。当密度增加至5.55万株·hm-2,则导致果蔗个体之间争水争肥,影响龙黑果蔗的茎粗,从而影响其商品性。果蔗单茎重与果蔗产量随着施肥量的增加而提高,当施肥量增加到纯N 900 kg·hm-2、纯P 900 kg·hm-2、纯K 900 kg·hm-2时,则导致单茎重下降,从而影响了其产量。

Effects of planting densities and fertilizer supplies on yield in Longhei chewing cane

Longhei chewing cane is a new chewing cane variety that bred by the Institute of Longjin Crop Varieties of Longyan.In this paper,effects of different planting densities and fertilizer supplies on yield in Longhei chewing cane were studied,using single factor experiment with randomized block design.The results showed that the optimum combinations comprised 4.5-5.0 double-bud segments·m-1 and 43500-49500 productive stems·hm-2,787.5 kg·hm-2 nitrogen(N),787.5 kg·hm-2 phosphor(P),787.5 kg·hm-2 potassium(K) and 4500 kg·hm-2 organic fertilizer.The stem diameter and marketability would be decreased while the planting densities amounted to 55500 strain·hm-2.The single stem weight and yield increased with fertilizer rate increasing.While the level of fertilizer supplies amounted to 900 kg·hm-2 of N,900 kg·hm-2 of P,900 kg·hm-2 of K,the single stem weight and yield would be decreased.