Effects of method of harvest and interval between harvests on edible leaf yield in fluted pumpkin

Two crops of fluted pumpkin (Telfairia occidentalis Hook.f.) were grown in the field and the effects of 3 methods of harvest and 4 intervals between harvests were studied.Frequent harvests (3- or 4-week intervals) yielded more edible leaf than infrequent harvests (6- or 8-week intervals) by inducing greater branching, allowing for more flushes and providing between and regular timing for taking advantage of new flushes following each harvest. Although significant differences in yield were not obtained among the 3 methods of harvest, harvesting by pruning appeared to be preferable, because it is a faster operation than either hand-picking or alternation of harvest-pruning and hand-picking methods. Extra benefits in harvest-pruning could come from yield of tender apical shoots which are also edible.     

香菇后潮菇营养补充研究

为筛选香菇后潮菇营养补充的有效营养剂和适宜使用浓度,作者选用了多种营养剂并设计多种浓度,在香菇菌棒长菇后期进行喷施试验。结果表明,有显著增产效果的营养液及其浓度依次为:0.5%KH2PO4>16.7%松针水煮液>1%KH2PO4>0.5%尿素>9.1%松针水煮液>1%KH2PO4与0.1%尿素混合液;增产百分率分别为84.1%、60.3%、48.6%、40.5%、32.3%和30.2%。     

A postmenopause-like model of ovariectomized Wistar rats to identify active principles of Erythrina lysistemon (Fabaceae)

To determine whether the two major compounds of Erythrina lysistemon are active principles accounting for Erythrina estrogenic effects, we used a postmenopause-like model of ovariectomized Wistar rats to evaluate their effects on some menopausal problems. Ovariectomized rats were orally treated either with compound 1 or compound 2 at 1 and 10 mg/kg BW for 28 days. Estradiol valerate served as the reference substance. As results, compounds 1 and 2 displayed estrogen-like effects on the uterus and the vagina, and reduced atherogenic risks by decreasing the two assessed atherogenic parameters, the total cholesterol/HDL-cholesterol ratio and the atherogenic index of plasma.     

高档名优绿茶仿生采摘指气动控制系统研制

为解决高档名优绿茶采摘劳动力紧缺和现有采茶机对新梢采摘缺乏选择性的问题,提出用于采茶机器人的、模仿人工“提手采”方式的仿生采摘指机构,通过固定、提拉等动作将新梢的茎拉断,并基于该机构设计采摘指气动控制系统。系统采用STM32芯片为控制核心,通过光耦继电器控制电磁换向阀两个出气口有序开启,从而控制气缸往复运动,实现采摘指对新梢的采摘。通过计算分析设计控制气路,对气路系统元件进行选型;完成控制系统硬件电路设计和软件开发,并制作样机。试验结果表明采摘指能有效实现新梢与茎秆的分离,一芽一叶采摘成功率达90%,验证了仿生采摘指气动控制系统的可行性和实用性。