种植密度对桂果蔗1号产量性状及商品性状的影响

Effects of Planting Density on Yield Traits and Commercial Characters of Guiguozhe No.1

为了解果蔗新品种桂果蔗1号在广西蔗区的适宜种植密度,为其推广应用提供配套栽培技术,于2016年分别在广西4个县蔗区对该品种进行了3.9万、4.2万、4.5万、4.8万、5.1万、5.4万株/hm^2等6个不同种植密度水平比较试验。结果表明:不同种植密度对桂果蔗1号株高、田间蔗汁锤度影响较小;茎径、商品蔗率随种植密度的增加而降低;茎产量、商品蔗产量、经济收入随种植密度的增加有先增后降的趋势。4.8万株/hm^2处理蔗产量最高,达到149 077.1kg/hm^2。商品蔗产量以4.8万、4.5万株/hm^2处理最高,分别达到144 325.3kg/hm^2和144 069.9kg/hm^2,经济纯收入以4.5万株/hm^2处理最高,达102 132.3元/hm^2;梢腐病的发病率为0.25%~0.89%,不同种植密度间没有明显的发生规律。桂果蔗1号在广西的适宜种植密度是4.5万株/hm^2,在实际生产中要因地制宜。

In order to optimize planting density of new chewing cane Guiguozhe No. 1 in Guangxi sugarcane region, and to provide the cultivation technique for its application, the experiment was conducted in 4 counties with 6 planting density including 39 000, 42 000, 45 000, 48 000, 51 000 and 54 000stalks/hm2 in 2016. The results showed that planting density had little influence on plant height and field brix of Guiguozhe No. I. Stalk diameter and cane commodity rate decreased with increased planting density. Cane yield, cane commodity yield and economy income increased firstly and then decreased with increased planting density. The highest cane yield reached 149 077. 1kg/hm2 with 48 000stalks/hm2, The highest and the following cane commodity yield reached 144 325.3kg/hm2 and 144 069.9kg/hm2 with 48 000 and 45 000 stalks/hm2, the highest economic income was up to 102 132.3yuan/hm2 with 45 000stalks/hm2. The incidence ofpokkah boeng disease had no significant changes among planting densities, which changed in 0.25%-0.89%. In present study, the suitable planting density of Guiguozhe No. 1 was 45 000stalks/hm2, but the fertilization levels should be carefully considered for its local situation.