摘要
为研究盐分土壤条件下磷肥对油菜光合性状和干物质生产的影响效应,以甘蓝型常规油菜品种‘宁油20号’为供试品种,设置不同磷肥用量处理,测定不同生育期叶面积、叶片净光合速率以及干物重。结果表明,0~120 kg/hm^(2)磷肥用量范围内,随着磷肥用量的增加,苗期和初花期叶面积指数、干物质积累量逐渐增加,成熟期籽粒产量及干物质积累量也逐渐增加。不施磷肥和30 kg/hm^(2)磷肥用量处理籽粒含油率较低,在磷肥用量达到60 kg/hm^(2)时再增加磷肥用量籽粒含油率无显著变化。苗期叶片净光合速率随磷肥用量的变化趋势与干物重变化一致,当磷肥用量达到60 kg/hm^(2)时进一步增加磷肥用量,初花期叶片净光合速率无显著变化。
The conventional Brassica napus cultivar‘Ningyou 20’was planted to study the effects of phosphorus fertilizer on photosynthetic characteristics and dry matter accumulation of rapeseed in saline soil.Leaf area indexes,leaf net photosynthetic rate and dry matter weight at different growth stages were tested.The results showed that,in the range of 0-120 kg/hm^(2)phosphate fertilizer application,with the increase of phosphorus fertilizer rate,the leaf area index and dry matter weight at seedling stage and early flowering stage increased,and the yield and dry matter weight at maturing stage also increased.Oil content was low in the treatments of zero and 30 kg/hm^(2)phosphorus fertilizer rate.When the phosphorus fertilizer rate reached 60 kg/hm^(2),there was no significant change in oil content with the further increase of the rate.The variation trend of leaf net photosynthetic rate with the change of the phosphorus fertilizer rate at seedling stage was consistent with that of the dry matter weight.With the phosphorus fertilizer rate reaching 60 kg/hm^(2),there was no significant increase in leaf net photosynthetic rate with the further increase of phosphorus fertilizer rate at early flowering stage.
作者
张宝涵
刘婧怡
尤晶晶
左青松
ZHANG Baohan;LIU Jingyi;YOU Jingjing;ZUO Qingsong(Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops,Yangzhou University,Yangzhou,Jiangsu 225009)
出处
《中国农学通报》
2022年第34期22-26,共5页
Chinese Agricultural Science Bulletin
基金
国家重点研发项目“大田经济作物优质丰产的生理基础与调控”(2018YFD1000900)。
关键词
油菜
盐分土壤
磷肥用量
光合性状
干物质积累
rapeseed
saline soil
phosphorus fertilizer rate
photosynthetic characteristics
dry matter accumulation
