摘要
以20a生库尔勒香梨为试材，在田间条件下研究了不同氮、磷、钾施肥处理对库尔勒香梨膨果期光合特性日变化的影响。结果表明：香梨叶片净光合速率日变化表现为典型的双峰曲线，具有明显的光合“午休”现象。与不施肥处理相比，施氮、磷、钾肥可促进香梨叶片净光合速率，但过量时会带来不利影响。通过模型建立与分析，肥料三要素对香梨叶片净光合速率的作用顺序为：施钾量〉施磷量〉施氮量，氮磷、氮钾之间具有协同效应，磷钾之间具有拮抗效应。以香梨叶片净光合速率为目标，推荐香梨膨果期氮（N）、磷（P2O5）、钾（K2O）施肥量分别为0．450-0．500、0．550-0．600、0．100-0．150kg／株。
Taking 20-year-old Korla fragrant pear as material, the effect of different treatments of N, P, K on photosynthetic characteristics of fruit enlargement stage of it was studied in field condition. The results showed that the diurnal variation curves of Pn of Korla fragrant pear presented double- apex curves, and had a phenomenon of photosynthetic ＇noon breaking＇. It could promote the net photosynthetic rate of leaves to apply fertilizer N,P and K,but the fertilizer excess were all not benefit. Through the establishment and analysis of model,the role of fertilizer N,P and K to Pn of Korla fragrant pear leaves was in order of K 〉 P 〉N. The interaction effect of P and N, K and N were coordination, but K and P were antagonistic effect. Taking the Pn as optimal composite scheme, the quantity of N,P, K for individual tree was 0. 450-0. 500 kg,0. 550-0. 600 kg,and 0. 100-0. 150 kg respectively.
出处
《北方园艺》
CAS
北大核心
2013年第17期171-174,共4页
Northern Horticulture
基金
新疆自治区"十二五"科技计划资助项目(201130102-2)
土壤学自治区重点学科资助项目
关键词
库尔勒香梨
施肥配比
膨果期
光合特性
Korla fragrant pear
fertilization proportion
fruit enlargement stage
photosynthetic characteristics
