抗虫杂交棉种植密度与叶枝利用效应研究

Studies on Application of Leaf Shoot for Hybrid Cotton Resistance to Bollworm

探讨了种植密度和整枝方式对抗虫杂交组合的产量和主要经济性状的影响。结果表明:在整枝情况下,杂交种不适合低密度种植,一般种植密度不应低于37500株/hm^2;在留叶枝情况下,杂交种适合低密度种植,种植密度22500株/hm^2左右;在低密度栽培下,留叶枝比整枝表现增产,但不同组合增产幅度差异较大。留叶枝与整枝相比,单株铃数显著增多,但铃重降低,纤维品质也相对变差。

Effects of density treatments and pruning modes on yield and main economic characters for hybrid cotton resistance to bollworm were studied in this paper. The hybrid cotton is not suitable for low density planting and its planting density can not be lower than 37 500 plants hm-2 for pruning mode , and is suitable for low density planting and its planting density can be lower than 22500 plants hm-2 for un-pruning one. The yield of the un-pruning mode is increased comparied with the pruning one at low planting density. The main characters for the un-pruning mode is different from the pruning one. Selecting hybrid cotton combinations is important for the low density planting system of hybrid cotton under the condition of keeping leaf shoot and low planting density.