以自研土壤改良剂为材料,按照蔬菜园每667 m2施入改良剂0 kg (CK)、25 kg(B25)、50 kg (B50)和75 kg (B75)设置四个处理,分析土壤改良剂对土壤pH、有机质含量以及‘小白苗’小白菜内在与外在品质的影响。结果表明,施用土壤改良剂能维持...以自研土壤改良剂为材料,按照蔬菜园每667 m2施入改良剂0 kg (CK)、25 kg(B25)、50 kg (B50)和75 kg (B75)设置四个处理,分析土壤改良剂对土壤pH、有机质含量以及‘小白苗’小白菜内在与外在品质的影响。结果表明,施用土壤改良剂能维持土壤pH 7.0以上,改善土壤酸化。不同土层的有机质含量表现为随着土层加深而降低。31~45 cm土层中,B25处理下有机质含量最高,为5.35 g·kg–1,显著高于CK组(P<0.05);土壤改良剂能提高小白菜VC、可溶性蛋白和游离氨基酸含量,降低硝酸盐含量。其中B75处理下,VC、可溶性蛋白和游离氨基酸的含量均为最高,与CK组差异显著(P<0.05),硝酸盐含量最低,为0.4713 mg·g–1,与其他处理差异显著(P<0.05)。适量施用土壤改良剂能增加小白菜叶长、叶宽和叶片数,提高小白菜外在品质,B25和B50处理下,小白菜地上部鲜重相比于CK组分别增加了79 g和16 g,差异显著(P<0.05)。使用自研的土壤改良剂能明显提高小白菜产量和品质,改善土壤环境。展开更多
[ Objective] To observe sub-chronic toxicity of Tephrosia canadida DC. in mice and thus to evaluate their safety to be used as protein feed resources. [ Methed]Sixty-four 6-week-old healthy Kunming mice weighing about...[ Objective] To observe sub-chronic toxicity of Tephrosia canadida DC. in mice and thus to evaluate their safety to be used as protein feed resources. [ Methed]Sixty-four 6-week-old healthy Kunming mice weighing about 25 g were randomly divided into four groups ( n = 16), half male and half female. Mass ratios of basic diet to leaf meal of Tephrosia canadida DC. in group A, group B, group C and group D were 10:0, 4:1, 3:2 and 2:3, respectively. After 35-d feeding, the effects of Tephrosia canadida DC. on growth, blood and organs of mice were observed. [ Resultl Dudng the trial, all mice had normal activities, and no death and no abnormal blood index were observed. All organs of the mice in the experimental groups had no visible pathological lesion, and organ indexes had no significant difference between the experimental groups and the control group. Except that slightly abnormal histological changes appeared in liver and kidney of the mice in the group C and D, no histological change was ob- served in other organs of the experimental mice. [ Conclusion] Tephrosia canadida DC. have no adverse effects on mice, which provides a refer- ence for research about their safety in feed of other animals.展开更多
文摘以自研土壤改良剂为材料,按照蔬菜园每667 m2施入改良剂0 kg (CK)、25 kg(B25)、50 kg (B50)和75 kg (B75)设置四个处理,分析土壤改良剂对土壤pH、有机质含量以及‘小白苗’小白菜内在与外在品质的影响。结果表明,施用土壤改良剂能维持土壤pH 7.0以上,改善土壤酸化。不同土层的有机质含量表现为随着土层加深而降低。31~45 cm土层中,B25处理下有机质含量最高,为5.35 g·kg–1,显著高于CK组(P<0.05);土壤改良剂能提高小白菜VC、可溶性蛋白和游离氨基酸含量,降低硝酸盐含量。其中B75处理下,VC、可溶性蛋白和游离氨基酸的含量均为最高,与CK组差异显著(P<0.05),硝酸盐含量最低,为0.4713 mg·g–1,与其他处理差异显著(P<0.05)。适量施用土壤改良剂能增加小白菜叶长、叶宽和叶片数,提高小白菜外在品质,B25和B50处理下,小白菜地上部鲜重相比于CK组分别增加了79 g和16 g,差异显著(P<0.05)。使用自研的土壤改良剂能明显提高小白菜产量和品质,改善土壤环境。
文摘[ Objective] To observe sub-chronic toxicity of Tephrosia canadida DC. in mice and thus to evaluate their safety to be used as protein feed resources. [ Methed]Sixty-four 6-week-old healthy Kunming mice weighing about 25 g were randomly divided into four groups ( n = 16), half male and half female. Mass ratios of basic diet to leaf meal of Tephrosia canadida DC. in group A, group B, group C and group D were 10:0, 4:1, 3:2 and 2:3, respectively. After 35-d feeding, the effects of Tephrosia canadida DC. on growth, blood and organs of mice were observed. [ Resultl Dudng the trial, all mice had normal activities, and no death and no abnormal blood index were observed. All organs of the mice in the experimental groups had no visible pathological lesion, and organ indexes had no significant difference between the experimental groups and the control group. Except that slightly abnormal histological changes appeared in liver and kidney of the mice in the group C and D, no histological change was ob- served in other organs of the experimental mice. [ Conclusion] Tephrosia canadida DC. have no adverse effects on mice, which provides a refer- ence for research about their safety in feed of other animals.