种植密度与行距配置对桑树农艺性状及产量的影响

Effects of Planting Density and Row Spacing on Agronomic Traits and Yield of Mulberry

为研究不同种植密度对桑树生长发育和产量的影响,以三倍体杂交桑组合桂桑6号的幼苗供试,于2019年在广西壮族自治区蚕业技术推广站资源圃进行桑树种植密度与行距配置的对比试验。共设计7种种植模式,对不同种植密度和行距配置下的桑叶产量以及农艺性状进行调查分析。结果表明不同种植模式试验组间的桑叶产量差异显著:0.5 m×0.2 m/1.2 m×0.2 m不等行距种植模式的桑叶产量最高,为50632.21 kg/hm^(2);其次是0.8 m×0.2 m等行距种植模式,桑叶产量为35587.23 kg/hm^(2);0.8 m×0.3 m等行距种植模式的桑叶产量最低,为25496.87 kg/hm^(2)。分析显示,部分农艺性状与桑叶产量有较大程度的相关性,随着农艺性状指标的提升,桑叶有增产的趋势,如桑叶产量与叶长、叶宽以及单株总条长呈显著正相关,相关系数分别为0.568、0.484和0.777;而部分农艺性状则与桑叶产量无相关性,如枝条总节数、每100 cm^(2)叶质量,相关系数分别为-0.040和0.207。依据试验结果认为,适当密度下不等行距种植模式的桑叶产量最高,且桑树单株总条长越长,桑叶产量越高。

In order to study the effects of different planting densities on the growth and yield of mulberry trees,using the triploid hybrid mulberry combination Guisang 6 as the material,a comparative experiment of mulberry planting density and row spacing configuration was carried out in the resource nursery of the Sericulture Technology Extension Station of Guangxi Zhuang Autonomous Region in 2019.Here,seven planting patterns were designed to analyze the agronomic traits and yield of mulberry under different planting densities and row spacing configurations.The results showed that the yield of mulberry leaves between the experimental groups of different planting patterns was significantly different.0.5 m×0.2 m/1.2 m×0.2 m unequal row spacing planting pattern had the highest yield of mulberry leaves,which was 50632.21 kg/hm^(2);followed by 0.8 m×0.2 m equal row spacing planting pattern,and the mulberry leaf yield was 35587.23 kg/hm^(2).However,the yield of the 0.8 m×0.3 m equal row spacing pattern was the lowest as 25496.87 kg/hm^(2).Correlation analysis showed that some agronomic traits were closely related to mulberry leaf yield.With the improvement of agronomic traits,mulberry leaf yield tended to increase.For example,the mulberry yield was highly significant correlated with the leaf length,leaf width,and the total branch length per plant,and the correlation coefficients were 0.568,0.484 and 0.777,respectively.However,some agronomic traits had no correlation with the mulberry leaf yield.For example,the total number of the nodes and leaf weight per 100 square centimeters,with correlation coefficients of 0.207 and-0.040,respectively.In summary,the yield of mulberry leaves in the unequal row spacing planting pattern was the highest under the appropriate density,and the longer the total branch length per plant,the higher the yield of the mulberry leaves.