Abstract:

Main biological traits of sweet maize and their relationships were investigated under both low phosphorus and high phosphorus conditions, with 18 landraces at seedling stage. The results showed that low phosphorus stress had greater influence on dry matter weight and P accumulation. There existed genotype differences of sweet maize landraces in tolerance to low-P stress. Dry matter weight and P accumulation could be used as indexes of screening sweet maize with tolerance to low- phosphorus.The result also indicated that Dingjian, Taiwanhuazhen and Xiantian number 5 had better tolerant ability to low-phosphorus stress, belonging to low-phosphorus-resistence varieties; while the tolerant ability to low-phosphorus stress of Jinmao number 3, Meiyu number 3 and Jinshengwang were very worse, belonging to low-phosphorus-sensitive varieties; and the other varieties belonged to the middle low-phosphorus-resistence varieties.