【目的】针对基质栽培番茄的营养液管理问题,研究了基于叶片数增长动态调控营养液供给对番茄生长、产量和品质的影响。【方法】温室基质栽培条件下,以番茄为试验材料,根据植株每增长1、2和3片叶时营养液浓度的提高幅度分别设置TR0.1（0....【目的】针对基质栽培番茄的营养液管理问题,研究了基于叶片数增长动态调控营养液供给对番茄生长、产量和品质的影响。【方法】温室基质栽培条件下,以番茄为试验材料,根据植株每增长1、2和3片叶时营养液浓度的提高幅度分别设置TR0.1（0.1 m S/cm）、TR0.2（0.2 m S/cm）和TR0.3（0.3 m S/cm）3个处理,即叶片数增长动态处理;另设常规营养液管理模式作为对照（CK）,即番茄定植至开花前、开花至第一穗果坐果、第一穗果坐果至采收结束3个生育期内供给营养液浓度分别为1.5、2.1和2.7 m S/cm。通过测定营养液总盐含量和番茄株高、茎粗、叶片数、产量、养分利用率和品质等指标对不同营养液管理方法进行评价。【结果】叶片数增长动态处理（TR0.1、TR0.2和TR0.3）营养液浓度提高频率是CK的2.0~5.6倍,且可利用的营养液总盐含量、大量元素和微量元素的总含量均表现为CK〉TR0.1〉TR0.2〉TR0.3。叶片数增长动态处理（TR0.1、TR0.2和TR0.3）和CK的茎粗和叶片数受营养液浓度提高幅度影响较小。TR0.1处理的产量和营养液养分利用率比CK分别提高了30.4%和37.7%（P〈0.05）。与CK相比,TR0.1、TR0.2和TR0.3处理的果实中硝酸盐含量和可滴定酸含量分别降低了19.4%~68.6%和16.7%~23.2%（P〈0.05）,总可溶性固形物和糖酸比分别增加了0.8%~12.9%（P〈0.05,TR0.3除外）和31.3%~34.7%（P〈0.05）,说明叶片数增长动态处理的果实品质优于CK。基于叶片数增长动态调控营养液供给的方法中,与TR0.3处理相比,TR0.1处理的株高增加7.5 cm（P〈0.05）,产量和营养液养分利用率分别提高了30.7%和29.4%（P〈0.05）;TR0.1处理果实硝酸盐含量、总可溶性固形物、可滴定酸含量和糖酸比均最高,除糖酸比外,各处理呈显著性差异。【结论】基于叶片数增长动态调控营养液浓度供给的方法优于常规基质栽培营养液管理方法,可以实现基质栽培番茄的高产优质,提高营养液养分利用率,其中每增长1片叶营养液浓度增加0.1 m S/cm的供给方法 （TR0.1）,因营养液浓度变化速率快,浓度变化幅度小,对促进番茄生长、养分吸收及增加产量、改善品质的效果最好,为供试条件下最优的营养液调控方法。展开更多
For the Sylvester continued fraction expansions of real numbers,FAN et al.(2007)proved that,for almost all real numbers,the nth partial quotient grows exponentially with respect to the product of the first n-1 partial...For the Sylvester continued fraction expansions of real numbers,FAN et al.(2007)proved that,for almost all real numbers,the nth partial quotient grows exponentially with respect to the product of the first n-1 partial quotients.In this paper,we establish the Hausdorff dimension of the exceptional set where the growth rate is a general function.展开更多
This article studies a class of nonlinear Kirchhoff equations with exponential critical growth,trapping potential,and perturbation.Under appropriate assumptions about f and h,the article obtained the existence of norm...This article studies a class of nonlinear Kirchhoff equations with exponential critical growth,trapping potential,and perturbation.Under appropriate assumptions about f and h,the article obtained the existence of normalized positive solutions for this equation via the Trudinger-Moser inequality and variational methods.Moreover,these solutions are also ground state solutions.Additionally,the article also characterized the asymptotic behavior of solutions.The results of this article expand the research of relevant literature.展开更多
文摘【目的】针对基质栽培番茄的营养液管理问题,研究了基于叶片数增长动态调控营养液供给对番茄生长、产量和品质的影响。【方法】温室基质栽培条件下,以番茄为试验材料,根据植株每增长1、2和3片叶时营养液浓度的提高幅度分别设置TR0.1（0.1 m S/cm）、TR0.2（0.2 m S/cm）和TR0.3（0.3 m S/cm）3个处理,即叶片数增长动态处理;另设常规营养液管理模式作为对照（CK）,即番茄定植至开花前、开花至第一穗果坐果、第一穗果坐果至采收结束3个生育期内供给营养液浓度分别为1.5、2.1和2.7 m S/cm。通过测定营养液总盐含量和番茄株高、茎粗、叶片数、产量、养分利用率和品质等指标对不同营养液管理方法进行评价。【结果】叶片数增长动态处理（TR0.1、TR0.2和TR0.3）营养液浓度提高频率是CK的2.0~5.6倍,且可利用的营养液总盐含量、大量元素和微量元素的总含量均表现为CK〉TR0.1〉TR0.2〉TR0.3。叶片数增长动态处理（TR0.1、TR0.2和TR0.3）和CK的茎粗和叶片数受营养液浓度提高幅度影响较小。TR0.1处理的产量和营养液养分利用率比CK分别提高了30.4%和37.7%（P〈0.05）。与CK相比,TR0.1、TR0.2和TR0.3处理的果实中硝酸盐含量和可滴定酸含量分别降低了19.4%~68.6%和16.7%~23.2%（P〈0.05）,总可溶性固形物和糖酸比分别增加了0.8%~12.9%（P〈0.05,TR0.3除外）和31.3%~34.7%（P〈0.05）,说明叶片数增长动态处理的果实品质优于CK。基于叶片数增长动态调控营养液供给的方法中,与TR0.3处理相比,TR0.1处理的株高增加7.5 cm（P〈0.05）,产量和营养液养分利用率分别提高了30.7%和29.4%（P〈0.05）;TR0.1处理果实硝酸盐含量、总可溶性固形物、可滴定酸含量和糖酸比均最高,除糖酸比外,各处理呈显著性差异。【结论】基于叶片数增长动态调控营养液浓度供给的方法优于常规基质栽培营养液管理方法,可以实现基质栽培番茄的高产优质,提高营养液养分利用率,其中每增长1片叶营养液浓度增加0.1 m S/cm的供给方法 （TR0.1）,因营养液浓度变化速率快,浓度变化幅度小,对促进番茄生长、养分吸收及增加产量、改善品质的效果最好,为供试条件下最优的营养液调控方法。
基金Supported by Projects from Chongqing Municipal Science and Technology Commission(CSTB2022NSCQ-MSX0445)。
文摘For the Sylvester continued fraction expansions of real numbers,FAN et al.(2007)proved that,for almost all real numbers,the nth partial quotient grows exponentially with respect to the product of the first n-1 partial quotients.In this paper,we establish the Hausdorff dimension of the exceptional set where the growth rate is a general function.
基金Supported by National Natural Science Foundation of China(11671403,11671236)Henan Provincial General Natural Science Foundation Project(232300420113)。
文摘This article studies a class of nonlinear Kirchhoff equations with exponential critical growth,trapping potential,and perturbation.Under appropriate assumptions about f and h,the article obtained the existence of normalized positive solutions for this equation via the Trudinger-Moser inequality and variational methods.Moreover,these solutions are also ground state solutions.Additionally,the article also characterized the asymptotic behavior of solutions.The results of this article expand the research of relevant literature.
