The experiment was conducted with 9 mulberry drought-resistant materials including ZL10, HP11, HP8, DJ2, TSH, HCS, GSY12, DJ6 and HS32, 8 botanical characteristics including spring buds number, growth buds number, buds number of stopped growing, rate of growing buds, branch length of growing buds, spring branch length, leaves number per kilogram of spring and autumn, and also 6 yield indicators including leaf yield of growing buds, leaf yield per 1 m branch and plant leaf yield of spring and autumn, and plant leaf yield per year were investigated, aiming to find the main influencing factors of mulberry leaf yield through the correlation analysis between 14 indicators. The results showed that, in the nine mulberry varieties, the plant leaf yield per year had significant positive correlation with spring plant leaf yield, autumn leaf yield per 1 m branch, and autumn plant leaf yield, and the correlation coefficient were 0.850 (P＜0.01), 0.683 (P＜0.05), and 0.762 (P＜0.05), respectively. The autumn leaf yield per 1 m branch had a significant negative correlation with leaves number per kilogram of spring (P＜0.05) and autumn (P＜0.05), and autumn plant leaf yield also had a significant negative correlation with leaves number per kilogram of autumn (P ＜0.05). In conclusion, the less the leaves number per kilogram of spring and autumn was, the higher the spring leaf yield was, the higher the leaf yield per 1 m branch and plant leaf yield in autumn were, the plant leaf yield per year was also higher.%以贵州地区9份桑树耐旱材料ZL10、HP11、HP8、DJ2、THS、HCS、GSY12、DJ6和HS32为研究对象,对其整个生长季的春发芽数、生长芽数、止心芽数、生长芽率、生长芽条长、春季枝条长、春季和秋季千克叶片数等8个植物学性状指标,以及生长芽产叶量、米条产叶量(春季和秋季)、株产叶量(春季和秋季)和年株产叶量等6个产量指标进行调查,并对各指标进行相关分析,旨在找出桑树产叶量的主要影响因素.结果表明:9个桑树品种年株产叶量与春季株产叶量、秋季米条产叶量和秋季株产叶量均呈显著或极显著正相关,其相关系数分别为0.850(P＜0.01),0.683(P＜0.05)和0.762(P＜0.05);秋季米条产叶量与春季千克叶片数和秋季千克叶片数分别呈显著(P＜0.05)和极显著负相关(P＜0.01),秋季株产叶量亦与秋季千克叶片数显著负相关(P＜0.05).由此可见,春季和秋季千克叶片数越少,春季产叶量越高,秋季米条产叶量和株产叶量越高,年株产叶量亦越高.
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