检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:敖雪[1] 谢甫绨[1] 刘婧琦[1] 张惠君[1]
出 处:《作物学报》2009年第3期522-529,共8页Acta Agronomica Sinica
基 金:辽宁省科技厅科技基金项目(2006201008);辽宁省教育厅创新团队项目(2006T116)资助
摘 要:以不同磷效率大豆品种为材料,调查磷高效和磷低效品种的生理指标,测定大豆生育期地上器官干物重,分析光合特性及物质生产特性。结果表明,在低磷条件下,各生育期的叶绿素含量、可溶性蛋白含量、净光合速率、气孔导度和叶肉导度均以磷高效品种较高,磷高效品种光合作用较强,CO2同化能力较高。各生育期,供试品种的叶绿素含量、可溶性蛋白含量、净光合速率、气孔导度和叶肉导度均在结荚期达到高峰而后下降,但磷高效品种下降速率低于磷低效品种。磷高效品种的单株和群体均具较高光合效率及生长参数,并受磷浓度影响较小,主要原因是其植株吸收磷量较多,有利于植株体内磷素平衡,即便在低磷条件下也有相对较强的光合能力,令其在低磷、中磷和高磷条件下都有较高的产量和籽粒磷效率。Soybean is sensitive to phosphorus deficiency in whole growth stage. Phosphorus plays an important role in photosynthesis. Our objective is to compare the difference of photosynthetic characteristics in soybean cultivars with different phosphorus efficiencies under different phosphorus levels in Shenyang during 2006-2007. The results showed that the soybean cultivars with high phosphorus efficiency had higher seed yields and higher seed phosphorus efficiency at each of the three phosphorus levels. Under phosphate deficiency condition, the cultivars with high phosphorus efficiency had a higher photosynthesis and CO2 assimilation capacity, as well as higher soluble protein content, lower stomatal restriction and higher yield. The contents of chlorophyll, soluble protein, net photosynthetic rate, stomatal conductance and mesophyll conductance all reached the peak at the podding stage, and then descended. Growth rate, leaf area duration (LAD), and net assimilation rate showed a rapid increase during the podding and grain- filling stages. The soybean cultivars with high phosphorus efficiency had higher net photosynthetic rate and growth indices at both the single plant and population levels, and had a small response to the change of phosphorus concentration. The main reason was that the phosphorus in the plants could be balanced by more absorption of phosphorus under low phosphorus situation, which could ensure a stronger photosynthesis.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.200