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在两种土壤类型条件下,对60个不同的甘薯品种(系)进行了干物质积累的比较试验。试验结果表明:在丘陵地区(棕壤土)种植的甘薯,有86.7%的品种(系)烘干率高于平原地区(褐土)种植的相同品种(系),增加幅度为0.2～7.0个百分点,有13.3%的品种(系)烘干率降低,降低幅度为0.1～2.0个百分点。说明甘薯干物质的积累受土壤类型影响较大,棕壤土比褐土更有利于甘薯干物质的积累。
Sixty sweet potato cultivars (lines) were tested for their dry matter accumulation under two soil types. The results showed that 86.7% of the sweet potato cultivated in the hilly area (brown earth) had higher drying rate than the same varieties (lines) planted in plain areas (cinnamon soil), with an increase of 0.2-7.0 percentage points , 13.3% of varieties (lines) drying rate decreased, the reduction rate of 0.1 to 2.0 percentage points. The results showed that the accumulation of dry matter in sweet potato was more affected by the type of soil. Brown soil was more conducive to the accumulation of dry matter in sweet potato than the cinnamon soil.