玉米拔节期水肥耦合效应研究

Couple Effect of Water and Fertilizer in Maize Jointing Stage

采用正交设计玉米拔节期水肥耦合试验表明,不同水肥条件下水分是玉米生长发育的决定性因素。对玉米拔节期株高的影响,水分和钾均达到了极显著水平,且水分的影响大于钾,氮和磷影响不显著。土壤持水量对玉米拔节期单株叶面积的影响达到极显著的水平,氮和钾均达到显著水平,磷的影响不显著。磷对根长有显著的影响,对根重的影响不显著。水分、氮、钾对玉米拔节期生物量的影响为正效应,磷为负效应。玉米拔节期的灌水利用率表现为,低水高肥达到最大,高水控制条件下玉米拔节期的灌水利用率均低于低水和中水。其中处理3(W1N3P3K3)的灌水利用率达到最大,处理7(W3W1P3K2)的灌水利用率最低。

The coupling of water and fertilizer test adopted the design of perpendicularity in jointing stage of the maize indicated that the water was a decisive factor of the maize growth under the conditions of different water and fertilizer. To the influence of the height of maize in jointing stage, water and potassium reached the extremely prominent level, and water 〉 potassium, nitrogen and phosphorus were not prominent. The influence on a leaf area of form in jointing stage of maize of the water-holding capacity of soil reached the extremely prominent level, nitrogen and potassium had reached the prominent level, the influence of the phosphorus is not prominent. Phosphorus had the prominent influence on the root, but to the weight of root is not prominent. The influence of water,nitrogen, potassium on biological quantity of jointing stage of the maize was the positive effect, phosphorus was negative. The irrigation rate of water during the maize jointing stage showed that the rate under controlled low water with high fertilizer was the highest, the rate under controlled high water in the maize jointing stage was lower than low water and media water. Deal with to irrigate water conservancy with to reach most heavy rate,The irrigation rate of treatment 3 was the highest,but the treatment 7 was the lowest.