为筛选出适合江苏地区种植的高产、高效水稻品种,采用盆栽试验,测定了江苏地区常见的11个水稻品种的株高、产量、结实率、总干物质量以及不同部位N、P含量,分析了水稻产量与其构成因素、氮磷积累量、氮磷收获指数间的相关关系。结果表明...为筛选出适合江苏地区种植的高产、高效水稻品种,采用盆栽试验,测定了江苏地区常见的11个水稻品种的株高、产量、结实率、总干物质量以及不同部位N、P含量,分析了水稻产量与其构成因素、氮磷积累量、氮磷收获指数间的相关关系。结果表明,水稻平均产量为16.85 g pot^(-1),变化幅度为8.28~25.18 g pot^(-1),品种间产量差异显著(P<0.05),其中泰瑞丰5产量最高。水稻各部位氮素含量从大到小依次为:籽粒>叶≈根>茎>谷壳,其中苏秀9籽粒中氮含量显著高于其他品种。磷素在水稻各部位中的含量分布为:籽粒>根≈茎>叶≈谷壳,籽粒中的磷含量最多的是南粳5055。相关分析表明,水稻的产量与总干物质量、穗粒数、氮磷积累量及氮磷收获指数均存在显著的相关性。不同品种水稻的产量、籽粒氮磷含量存在显著差异,这为高产、高效水稻品种的筛选提供了重要的科学依据。展开更多
The correlation between the stress concentration and the spontaneous magnetic signals of metal magnetic memory(MMM) was investigated via tensile tests. Sheet specimens of the Q235 steel were machined into standard bar...The correlation between the stress concentration and the spontaneous magnetic signals of metal magnetic memory(MMM) was investigated via tensile tests. Sheet specimens of the Q235 steel were machined into standard bars with rectangular holes to obtain various stress concentration factors. The tangential component Hp(x) of MMM signals and its related magnetic characteristic parameters throughout the loading process were presented and analyzed. It is found that the tangential component Hp(x) is sensitive to the abnormal magnetic changes caused by the local stress concentration in the defect area. The minimum magnetic field is positively correlated to the magnitude of the load and the distance from the notch. The tangential magnetic stress concentration factor presents good numerical stability during the entire loading process, and can be used to evaluate the stress concentration factor. The results obtained will be a complement to the MMM technique.展开更多
文摘为筛选出适合江苏地区种植的高产、高效水稻品种,采用盆栽试验,测定了江苏地区常见的11个水稻品种的株高、产量、结实率、总干物质量以及不同部位N、P含量,分析了水稻产量与其构成因素、氮磷积累量、氮磷收获指数间的相关关系。结果表明,水稻平均产量为16.85 g pot^(-1),变化幅度为8.28~25.18 g pot^(-1),品种间产量差异显著(P<0.05),其中泰瑞丰5产量最高。水稻各部位氮素含量从大到小依次为:籽粒>叶≈根>茎>谷壳,其中苏秀9籽粒中氮含量显著高于其他品种。磷素在水稻各部位中的含量分布为:籽粒>根≈茎>叶≈谷壳,籽粒中的磷含量最多的是南粳5055。相关分析表明,水稻的产量与总干物质量、穗粒数、氮磷积累量及氮磷收获指数均存在显著的相关性。不同品种水稻的产量、籽粒氮磷含量存在显著差异,这为高产、高效水稻品种的筛选提供了重要的科学依据。
基金Funded by the Zhejiang Provincial Natural Science Foundation of China(LZ12E08003)the Fundamental Research Funds for the Central Universities,China(2015QNA4028)
文摘The correlation between the stress concentration and the spontaneous magnetic signals of metal magnetic memory(MMM) was investigated via tensile tests. Sheet specimens of the Q235 steel were machined into standard bars with rectangular holes to obtain various stress concentration factors. The tangential component Hp(x) of MMM signals and its related magnetic characteristic parameters throughout the loading process were presented and analyzed. It is found that the tangential component Hp(x) is sensitive to the abnormal magnetic changes caused by the local stress concentration in the defect area. The minimum magnetic field is positively correlated to the magnitude of the load and the distance from the notch. The tangential magnetic stress concentration factor presents good numerical stability during the entire loading process, and can be used to evaluate the stress concentration factor. The results obtained will be a complement to the MMM technique.
