| 张蓓蓓,张辉,景琦,武悦萱,校思泽,王苗苗.两种水分条件下真菌接种及氮肥施加对小麦生长、生理及氮磷吸收的影响[J].干旱地区农业研究,2019,37(1):214~220 |
| 两种水分条件下真菌接种及氮肥施加对小麦生长、生理及氮磷吸收的影响 |
| Effect of mycorrhizal fungi inoculation and nitrogen fertilization on physiological characteristics, growth, and nitrogen and phosphorus uptake of wheat under two distinct water regimes |
| |
| DOI：10.7606/j.issn.1000-7601.2019.01.30 |
| 中文关键词: 小麦 生长 干旱 真菌 氮肥 氮吸收 磷吸收 水分利用效率 |
| 英文关键词:wheat growth drought mycorrhizae fungi nitrogen fertilizer nitrogen uptake phosphorus uptake water use efficiency |
| 基金项目:国家自然科学基金（41601016）；陕西省科技厅自然基金专项（2015JM4136）；陕西省特支计划“青年拔尖人才”项目；宝鸡文理学院重点项目（ZK2018025） |
|
| 摘要点击次数: 1542 |
| 全文下载次数: 738 |
| 中文摘要: |
| 为探究不同水分条件下真菌接种和氮肥施加对小麦生长、水分利用效率及营养吸收的影响，以小麦品种Superb为材料，选取丛枝菌根接种（接种和不接种）和氮肥施加（0 kg·hm-2和180 kg·hm-2）在两个水分处理（拔节期开始，水分充足95%（WW）和水分胁迫40%田间持水量（WD））的温室条件下进行试验，分析开花期生长及叶片气体交换参数和成熟期产量及籽粒、茎秆氮磷含量的变化，最后对水分利用效率和籽粒、茎秆氮磷含量作了相关性分析。结果显示：两种水分条件下接种丛枝菌根（AMF）均显著提高旗叶的比叶面积（SLA）,其中，水分胁迫处理施氮显著降低叶片SLA，AMF接种显著增大叶片的相对含水量（RWC）;两种水分条件下，菌根接种和氮肥（N）施加均显著提高叶片净光合速率（Pn）和蒸腾速率（Tr）,其中，水分胁迫处理下，AMF接种对Pn的影响显著，N肥施加和AMF接种后的Pn比CK高31%;两种水分处理下，N肥施加和AMF接种后小麦WUE和瞬时水分利用效率（WUEi）值升高，其中，水分胁迫环境下，AMF接种和N肥施加下小麦WUE分别提高了13.02%和1.17%，且不同处理下叶片稳定性碳同位素分辨率（CID）也有所升高。水分胁迫处理下，施N和AMF接种均显著提高小麦茎和籽粒氮含量、株高、生物量和产量，茎秆和籽粒的磷含量也显著升高。WUE与籽粒、茎秆氮、磷含量呈显著的正相关，CID与籽粒、茎秆氮磷含量呈显著负相关关系。总的来说，N肥施加和AMF接种可显著改善小麦在干旱条件下的生长及生理变化。 |
| 英文摘要: |
| In order to explore the effects of mycorrhizal fungi (AMF) inoculation and N fertilization （0 kg·hm-2 and 180 kg·hm-2）on wheat growth, WUE, nutrient uptake under different water regimes, well-watered (WW) and water-deficit (WD), a greenhouse experiment was conducted and relationships among the phosphorus (P), N concentration of stem, seed, and WUE were also analyzed. The results showed that the specific leaf area (SLA) of flag leaves was significantly increased by AMF inoculation under the two water regimes while the SLA was lowered under N fertilization and the relative water content (RWC) was increassed under drought conditions. Nitrogen fertilization significantly increased the leaf Pn and Tr but AMF inoculation only significantly increased the Pn under N fertilization and AMF inoculation by 31% under water-deficit condition compared to CK. The WUE and instantaneous WUE (WUEi) were enhanced by N fertilization and AMF inoculation under both water conditions. Under water-deficit condition, the wheat WUE increased by 13.02% and 1.17% , respectively, under the inoculation of AMF and N fertilization. In addition, the leaf carbon isotope discrimination (CID) was also increased under different treatments. Combined N fertilization and AMF inoculation significantly increased N concentrations in wheat stem and grain, plant height, biomass, and grain yield under water-deficit situation. The P concentrations in stem and grain were also increased. In addition, the WUE was positively correlated with grain N, and stem N, P concentrations. In general, the plant physiological characters were decreased by water-deficiency but improved by N fertilization and AMF inoculation under water-deficiency. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |