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以中棉所 1 9号为材料研究了旱作条件下的施肥技术及其生理学依据。结果表明 ,旱地棉花不同施肥处理的生育期、衣分等无明显差异 ,而棉花株高增长、总铃数、铃重等则因施肥处理不同有明显差异 ,以每公顷纯N1 5 0kg、P2 O51 2 0kg、K2 O1 2 0kg全部基施的产量最高。形态学观察和生理学测定表明 ,基施氮肥有利于前期营养体的生长而较早搭起丰产架子 ;配合基施磷、钾肥促进了棉花根系发育 ,使功能叶片中K+ 含量和POD活性升高 ,增强了棉花的耐旱能力。
CIMC No.19 was used to study the fertilization technology under drought condition and its physiological basis. The results showed that there was no significant difference in growth period and lint percentage among different fertilization treatments in upland cotton. However, there were significant differences in height growth, boll number, O51 2 0kg, K2 O1 2 0kg all the highest base yield. Morphological observation and physiological tests showed that basal nitrogen fertilization was beneficial to the growth of early vegetative organs and early emergence of high yield shelter. Phosphorus and potassium fertilizers promoted cotton root development and increased K + content and POD activity in functional leaves. Enhanced cotton drought tolerance.