以美国大速生生菜为试验材料,研究绿天、益丰源、绿神保3种微生物菌肥对生菜生长和品质的影响.结果表明:3种微生物菌肥均能在适宜浓度下不同程度地促进生菜生长,改善生菜品质,降低硝酸盐含量,而高浓度微生物菌肥会抑制生菜生长,低浓度则无显著影响.3种微生物菌肥最适宜的施用浓度均为1∶300,促进效果为绿天＞益丰源＞绿神保.

Taking grafted seedings of Citrus reticulate 'Shatangju'on rootstock of trifoliate orange as material,the determination effects of I2-KI,TTC,MTT and in vitro pollen germination method were compared and their effect on in vitro activity of pollen between the different types of flower(the flower with leaves and non-leaf flower)of Citrus reticulate'Shatangju'were studied.The results indicated that the pollen of Citrus reticulate'Shatangju'viability of nonleaf flower was higher than the pollen viability of flower with leaves.MTT staining method was the optimum and rapid staining method to determine pollen viability of Citrus reticulate'Shatangju'.

This experiment was conducted with the effects of different concentrations of spermidine on Citrus reticulata cv Shatangju. The study includes pollen germination in vitro, development of ovary, fruit setting rate of Shatangju. The results showed that: exogenous Spd treatment can promote Shatangju's pollen germination and promote ovary development, improve the fruit setting rate under a suitable concentration, especially for non-leaf flower is more effective. Exogenous spd concentration of 50μmol/L is the best choice for two different types of flower on pollen germination, flower setting and fruit setting rate.

By the methods of principal component analysis,subordinate function,and cluster analysis,a comprehensive evaluation was conducted on the low ground temperature-resistance of 14 physiological indices of twelve marigold cultivars.The results indicated that the different tomato varieties of 14 physiological indicators in different degree, showing in the low ground temperature stress, the physiological indices exists between certain synergy and meet resistance. Six principal factors presented86.27% of the information of the 14 indices. The comprehensive evaluation value of the low ground temperature-resistance of the12 cultivars was in the order of'CM78''Toward the research' 'CM966' 'Gold beautiful' 'win beauty ' 'Vegetarian in 4' 'Prosperous powder' 'Gold crown a number' 'And within 3' 'Gingko strong abundant' 'Pink tomato''gold 168'.