为探究锌锰硼配施对雪茄烟叶矿质元素含量变化及其与干物质积累间的关系,本试验以德雪1号为试材,设置叶面喷施7.5 g ZnSO_(4)+10 g MnSO_(4)+7.5 g硼砂(T1,666.7m^(2)用量,下同)、10 g ZnSO_(4)+10 g MnSO_(4)+7.5 g硼砂(T2)、10 g ZnSO...为探究锌锰硼配施对雪茄烟叶矿质元素含量变化及其与干物质积累间的关系,本试验以德雪1号为试材,设置叶面喷施7.5 g ZnSO_(4)+10 g MnSO_(4)+7.5 g硼砂(T1,666.7m^(2)用量,下同)、10 g ZnSO_(4)+10 g MnSO_(4)+7.5 g硼砂(T2)、10 g ZnSO_(4)+15 g MnSO_(4)+10 g硼砂(T3)、15 g ZnSO_(4)+15 g MnSO_(4)+10 g硼砂(T4)和清水(CK)共5个处理,研究其对雪茄烟矿质元素含量动态变化和干物质积累的影响,并分析全生育期内烟叶矿质元素间及其与干物质积累间的相关性。结果表明,生育期内,随着锌锰硼配施量的增加,雪茄烟叶Fe含量呈先降低后升高再降低趋势,其余10种元素含量和干物质积累量均呈先增加后降低趋势,尤以T2处理含量最佳,干物质积累量最大。随生育进程,不同处理叶片P、Ca、Zn、Fe含量先升后降,N、Na含量先降后升;K含量总体呈下降趋势,而Mg含量呈先升后降再升高并趋于平稳变化趋势;生育期内Cu、Mn、B含量呈波浪状变化。叶片中N与P、K元素间存在协同增效机制,Ca、Mn元素可促进Mg、Zn、B、Na的吸收;而Fe与Ca、Zn、Mn及B与Cu、Fe间存在拮抗作用。全生育期内叶片中P、Mg、Mn、Na含量与干物质积累量间存在显著或极显著正相关。综合来看,锌锰硼肥配施可促进雪茄烟叶矿质元素的吸收和积累,提高烟株干物质积累量,666.7m^(2)以10 g ZnSO_(4)+10 g MnSO_(4)+7.5 g硼砂配施效果最好。展开更多
Factors controlling the production and partitioning of seed phenolics within soybean are not understood. Understanding these factors may justify selection for higher levels of seed phenolics because of their beneficia...Factors controlling the production and partitioning of seed phenolics within soybean are not understood. Understanding these factors may justify selection for higher levels of seed phenolics because of their beneficial impact on human health and soybean defense mechanism against diseases. The objective of this research was to investigate the partitioning of seed phenolics (phenol, lignin, and isoflavones) along the main stem of soybean genotypes. A repeated green- house experiment was conducted on different soybean genotypes of different maturity and different stem archi-tecture (determinate and indeterminate). Genotypes were DT 97-4290, maturity group (MG) IV;Stressland, MG IV;Hutcheson, MG V;and Tracy-M, MG VI. Seed were harvested from top and bottom nodes at seed-fill stage (R6) and harvest ma- turity stage (R8). At R6, seed phenolic compounds (phenol, lignin, and isoflavones daidzein, genistein, and glycitein) were greater in the bottom seed than the top seed. This trend was observed in DT 97-4290, Tracy-M, and Hutcheson, but not in Stressland. Also, this trend was more obvious with daidzein and genistein isoflavones than glycitein. The maximum phenolic compounds were recorded at R8. The higher phenolic compounds concentration in bottom seed than in top seed was accompanied by higher cell wall boron (B) percentage and lower total B in bottom seed. The current research demonstrated that phenolic compounds partitioned differently between the top and bottom seed nodes. This trend cannot be generalized in soybean genotypes unless enough germplasm is tested. The partitioning of higher phenolic compounds concentration along the main stem would allow for single seed selection in the breeding program for higher levels of phenolic compounds and for accurate measurements of seed phenolics in breeding lines. The associa- tion of B trend with phenolic compound trend may suggest B involvement in phenolic metabolism, and support the structural role of B. Breeding for higher levels of phenolics, especially isoflavones, woul展开更多
文摘为探究锌锰硼配施对雪茄烟叶矿质元素含量变化及其与干物质积累间的关系,本试验以德雪1号为试材,设置叶面喷施7.5 g ZnSO_(4)+10 g MnSO_(4)+7.5 g硼砂(T1,666.7m^(2)用量,下同)、10 g ZnSO_(4)+10 g MnSO_(4)+7.5 g硼砂(T2)、10 g ZnSO_(4)+15 g MnSO_(4)+10 g硼砂(T3)、15 g ZnSO_(4)+15 g MnSO_(4)+10 g硼砂(T4)和清水(CK)共5个处理,研究其对雪茄烟矿质元素含量动态变化和干物质积累的影响,并分析全生育期内烟叶矿质元素间及其与干物质积累间的相关性。结果表明,生育期内,随着锌锰硼配施量的增加,雪茄烟叶Fe含量呈先降低后升高再降低趋势,其余10种元素含量和干物质积累量均呈先增加后降低趋势,尤以T2处理含量最佳,干物质积累量最大。随生育进程,不同处理叶片P、Ca、Zn、Fe含量先升后降,N、Na含量先降后升;K含量总体呈下降趋势,而Mg含量呈先升后降再升高并趋于平稳变化趋势;生育期内Cu、Mn、B含量呈波浪状变化。叶片中N与P、K元素间存在协同增效机制,Ca、Mn元素可促进Mg、Zn、B、Na的吸收;而Fe与Ca、Zn、Mn及B与Cu、Fe间存在拮抗作用。全生育期内叶片中P、Mg、Mn、Na含量与干物质积累量间存在显著或极显著正相关。综合来看,锌锰硼肥配施可促进雪茄烟叶矿质元素的吸收和积累,提高烟株干物质积累量,666.7m^(2)以10 g ZnSO_(4)+10 g MnSO_(4)+7.5 g硼砂配施效果最好。
文摘Factors controlling the production and partitioning of seed phenolics within soybean are not understood. Understanding these factors may justify selection for higher levels of seed phenolics because of their beneficial impact on human health and soybean defense mechanism against diseases. The objective of this research was to investigate the partitioning of seed phenolics (phenol, lignin, and isoflavones) along the main stem of soybean genotypes. A repeated green- house experiment was conducted on different soybean genotypes of different maturity and different stem archi-tecture (determinate and indeterminate). Genotypes were DT 97-4290, maturity group (MG) IV;Stressland, MG IV;Hutcheson, MG V;and Tracy-M, MG VI. Seed were harvested from top and bottom nodes at seed-fill stage (R6) and harvest ma- turity stage (R8). At R6, seed phenolic compounds (phenol, lignin, and isoflavones daidzein, genistein, and glycitein) were greater in the bottom seed than the top seed. This trend was observed in DT 97-4290, Tracy-M, and Hutcheson, but not in Stressland. Also, this trend was more obvious with daidzein and genistein isoflavones than glycitein. The maximum phenolic compounds were recorded at R8. The higher phenolic compounds concentration in bottom seed than in top seed was accompanied by higher cell wall boron (B) percentage and lower total B in bottom seed. The current research demonstrated that phenolic compounds partitioned differently between the top and bottom seed nodes. This trend cannot be generalized in soybean genotypes unless enough germplasm is tested. The partitioning of higher phenolic compounds concentration along the main stem would allow for single seed selection in the breeding program for higher levels of phenolic compounds and for accurate measurements of seed phenolics in breeding lines. The associa- tion of B trend with phenolic compound trend may suggest B involvement in phenolic metabolism, and support the structural role of B. Breeding for higher levels of phenolics, especially isoflavones, woul
