[Objective] This study aimed to investigate the effect of different boric fer- tilizer on the growth, yield and quality of strawberry. [Method] With a strawberry cultivar Hongyan as the test material, water, borax and...[Objective] This study aimed to investigate the effect of different boric fer- tilizer on the growth, yield and quality of strawberry. [Method] With a strawberry cultivar Hongyan as the test material, water, borax and foliar disodium octoborate tetrahydrate was respectively sprayed to the leaves of strawberry four times from the squaring stage on. At the initial flowering stage and mature stage, the plant height, stem diameter, leaf area and petiole length of strawberry were measured; at the harvest time, the single fruit weight of strawberry was measured; and at the mature stage, the VC, sugar and organic acids contents in the strawberry fruit were determined. [Result] Compared with the control group, the spraying of foliar disodi- um octoborate tetrahydrate promoted the growth and significantly increased the plant height and leaf area of strawberry. However, no significant difference was found in root shoot ratio of strawberry between foliar disodium octoborate tetrahydrate treat- ment and the control group. Spraying of boric fertilizers significantly increased the single fruit weight and yield of strawberry. Compare with the control group, the spraying of foliar disodium octoborate tetrahydrate and borax increased the single fruit weight of strawberry by 20.14% and 4.86% respectively, and increased the yield of strawberry by 17.28% and 4.02% respectively. Compared with borax treat- ment and the control group, spraying of foliar disodium octoborate tetrahydrate im- proved the quality, i.e., increased the VC content, soluble solids content and sugar- acid ratio in strawberry fruit. The B content in leaf of strawberry was increased after foliar B fertilization. Among the three groups, the B content in leaf of strawberry ranked as disodium octoborate tetrahydrate treatment＇s 〉 borax treatment＇s 〉 con- trol＇s. [Conclusion] Spraying foliar disodium octoborate tetrahydrate can promote the growth, yield and quality of strawberry.展开更多
ObjectiveThis study aimed to investigate the effect of fulvic acid on the growth and yield components of direct seeding rice （Nanjing 44）. MethodThe rice seeds were soaked in 0 （water as a control）, 1, 2, 4 and 6 ...ObjectiveThis study aimed to investigate the effect of fulvic acid on the growth and yield components of direct seeding rice （Nanjing 44）. MethodThe rice seeds were soaked in 0 （water as a control）, 1, 2, 4 and 6 g/L fulvic acid （FA） before sowed. Then, the rice morphological indices, leaf chlorophyll content, photosynthesis parameters, root activity and chlorophyll fluorescence parameters were measured in the following field studies. ResultCompared with the control, the leaf area index, chlorophyll content, net photosynthetic rate, stomatal conductance and dry matter weight and some fluorescence parameters such as the maximum photochemical efficiency of photosystem II （PSII） （Fv/Fm）, excitation energy capture efficiency of opened PSII reaction center （Fv’/Fm’） and efficiency of the open reaction centre （ΦPS II） increased by different levels at both jointing stage and heading stage of direct seeding rice, whose seeds were soaked by FA with different concentrations. High FA concentration （4-6 g/L） significantly increased the cultivated rice leaf area index, chlorophyll content, net photosynthetic rate, stomatal conductance, transpiration rate and dry matter weight by 10.32% -22.88% , 5.88% -13.11% , 12.16% -26.84% , 11.43% -88.46% , 10.63% -21.63% , 18.49% -19.68% , respectively, thereby improving the physiological function and light energy transform efficiency of rice at the growth stage. With FA concentration increasing, the yield, effective panicles, grain number per panicle and seed setting rate were increased significantly compared with the control by 17.52%-18.71%, 3.46%-3.85%, 6.30%- 6.51% and 7.82%-8.69% respectively. ConclusionSoaking rice seed with FA could be considered as an effective way to improve the rice competitiveness at early growth stage.展开更多
With the urgent shortage of forest resource in China, using agro-residues as raw materials of composite become increasingly important. Agro-residue is the most potential fiber resource, which is helpful to sustainable...With the urgent shortage of forest resource in China, using agro-residues as raw materials of composite become increasingly important. Agro-residue is the most potential fiber resource, which is helpful to sustainable development of composite industries in China. Based on a great deal of researches, this paper summarized and discussed some problems in using agro-residues as raw materials of composites, including raw material preparation, hot-pressing, bonding technology, preventing composite from going moldy. It is proposed that to manufacture the composite of rice straws or wheat straws, the isocayante resin is a suitable adhesive, and the appropriate technologies, bonding, and treatment measures are also needed.展开更多
文摘[Objective] This study aimed to investigate the effect of different boric fer- tilizer on the growth, yield and quality of strawberry. [Method] With a strawberry cultivar Hongyan as the test material, water, borax and foliar disodium octoborate tetrahydrate was respectively sprayed to the leaves of strawberry four times from the squaring stage on. At the initial flowering stage and mature stage, the plant height, stem diameter, leaf area and petiole length of strawberry were measured; at the harvest time, the single fruit weight of strawberry was measured; and at the mature stage, the VC, sugar and organic acids contents in the strawberry fruit were determined. [Result] Compared with the control group, the spraying of foliar disodi- um octoborate tetrahydrate promoted the growth and significantly increased the plant height and leaf area of strawberry. However, no significant difference was found in root shoot ratio of strawberry between foliar disodium octoborate tetrahydrate treat- ment and the control group. Spraying of boric fertilizers significantly increased the single fruit weight and yield of strawberry. Compare with the control group, the spraying of foliar disodium octoborate tetrahydrate and borax increased the single fruit weight of strawberry by 20.14% and 4.86% respectively, and increased the yield of strawberry by 17.28% and 4.02% respectively. Compared with borax treat- ment and the control group, spraying of foliar disodium octoborate tetrahydrate im- proved the quality, i.e., increased the VC content, soluble solids content and sugar- acid ratio in strawberry fruit. The B content in leaf of strawberry was increased after foliar B fertilization. Among the three groups, the B content in leaf of strawberry ranked as disodium octoborate tetrahydrate treatment＇s 〉 borax treatment＇s 〉 con- trol＇s. [Conclusion] Spraying foliar disodium octoborate tetrahydrate can promote the growth, yield and quality of strawberry.
基金Supported by Special Fund for Agro-scientific Research in the Public Interest(201303022)National Key Technology Research and Development Program during the 12th Five-Year Plan Period(2012BAD19B02)~~
文摘ObjectiveThis study aimed to investigate the effect of fulvic acid on the growth and yield components of direct seeding rice （Nanjing 44）. MethodThe rice seeds were soaked in 0 （water as a control）, 1, 2, 4 and 6 g/L fulvic acid （FA） before sowed. Then, the rice morphological indices, leaf chlorophyll content, photosynthesis parameters, root activity and chlorophyll fluorescence parameters were measured in the following field studies. ResultCompared with the control, the leaf area index, chlorophyll content, net photosynthetic rate, stomatal conductance and dry matter weight and some fluorescence parameters such as the maximum photochemical efficiency of photosystem II （PSII） （Fv/Fm）, excitation energy capture efficiency of opened PSII reaction center （Fv’/Fm’） and efficiency of the open reaction centre （ΦPS II） increased by different levels at both jointing stage and heading stage of direct seeding rice, whose seeds were soaked by FA with different concentrations. High FA concentration （4-6 g/L） significantly increased the cultivated rice leaf area index, chlorophyll content, net photosynthetic rate, stomatal conductance, transpiration rate and dry matter weight by 10.32% -22.88% , 5.88% -13.11% , 12.16% -26.84% , 11.43% -88.46% , 10.63% -21.63% , 18.49% -19.68% , respectively, thereby improving the physiological function and light energy transform efficiency of rice at the growth stage. With FA concentration increasing, the yield, effective panicles, grain number per panicle and seed setting rate were increased significantly compared with the control by 17.52%-18.71%, 3.46%-3.85%, 6.30%- 6.51% and 7.82%-8.69% respectively. ConclusionSoaking rice seed with FA could be considered as an effective way to improve the rice competitiveness at early growth stage.
文摘With the urgent shortage of forest resource in China, using agro-residues as raw materials of composite become increasingly important. Agro-residue is the most potential fiber resource, which is helpful to sustainable development of composite industries in China. Based on a great deal of researches, this paper summarized and discussed some problems in using agro-residues as raw materials of composites, including raw material preparation, hot-pressing, bonding technology, preventing composite from going moldy. It is proposed that to manufacture the composite of rice straws or wheat straws, the isocayante resin is a suitable adhesive, and the appropriate technologies, bonding, and treatment measures are also needed.
