不同消毒剂及清洗温度对番茄货架期腐烂率的影响   总被引：2，自引：0，他引：2  

王金玉  张学杰  郭科  孙雅君  Robert Holmes  Simone Kreidl 《中国蔬菜》2009,1(12):7-10

针对番茄采后腐烂率较高的问题,研究了不同清洗温度〔果温（28±5）℃〕下消毒剂（100  mg·kg^-1 NaClO和5 mg·kg^-1 ClO₂）和自来水清洗处理对番茄货架期（PE包装,室温28～30 ℃,7 d）腐 烂率的影响。结果表明,与不清洗对照相比,清洗后番茄果实腐烂率由47 %下降到9 %～26 %;清洗温度 对自来水和ClO₂处理的番茄果实腐烂率影响不大,但高于果温（28 ℃）5 ℃的NaClO处理的番茄果实腐 烂率较低于果温5 ℃的NaClO处理显著降低,其货架7 d番茄果实腐烂率仅为9 %,是各清洗处理中效果最 好的。  相似文献   

Soil and landform features of mountainous terrain in South Thailand     

K.J. Virgo  D.A. Holmes 《Geoderma》1977,18(3):207-225

The results of reconnaissance surveys over 2,000 Km² are used to described mountainous terrain on granite, gneiss and pelite. Detailed morphological and laboratory analytical data are presented for soils derived from each of these rock types. The soils, which are classed as Paleudults, are acid, kaolinite-rich and deficient in nutrients. Soils formed on granite and gneiss have high proportions of coarse quartz particles (2.0–50.0 mm); the dilution effect of this inert material further reduces their effective nutrient status. The degree of weathering, as indicated by the silt:silt+clay ratio, increases with profile depth.Mean gradients recorded on the granite and pelite hillslopes are 27° and 29°, respectively. A greater uniformity of slopes was observed on pelites than on granites; the ‘missing angle’ technique was employed to identify ‘natural’ slope classes. Gradients tend to increase downlopw, indicating a rapid removal of erosion products at the footslope and a rejuvenation of the valleys. A significant association was recorded between soil depth and slope gradient on pelite but not on granite or gneiss landforms.  相似文献   

THE EFFECT OF NITROGEN APPLICATION TO PASTURE ON BEEF PRODUCTION     

J. C. Holmes  R. W. Lang 《Grass and Forage Science》1974,29(2):121-131

Five grazing experiments each lasting 2 or 3 years were made between 1955 and 1967, all starting in the first year of ryegrass/cocksfoot/clover or ryegrass/clover leys. A high and a low rate of N, 235 and 45 Ib/ac on average (263 and 51 kg/ha) were compared for beef production. High- and low-N treatments gave mean clover contents for the grazing season of 8 and 24 % on a dry-weight basis, respectively. High N consistently gave a smaller liveweight gain/animal than low N, on average 1±92 and 2±08 Ib/day (0±87 and 0±94 kg/day), respectively. Liveweight gain/ac was 20% greater for high N than for low N, and in terms of net energy the production from high- and low-N, respectively, was 18,500 and 15,000 MJ/ac (45,700 and 37,100 MJ/ha). Data from these experiments, together with published results, were used to calculate a regression of liveweight gain response on N rate and an equation was derived from this to express the output in terms of profit. At 1971 prices profit was maximal at λ0±9/ac (λ2/ha) with 112 Ib N/ac (125 kg N/ha); it was considerably greater at 1973 prices when higher rates of N were justified.  相似文献   

THE EFFECT OF NITROGEN AND STOCKING RATE ON THE OUTPUT OF PASTURE GRAZED BY BEEF CATTLE     

I. M. Yiakoumettis  W. Holmes 《Grass and Forage Science》1972,27(3):183-192

An experiment was conducted in two successire years to measure the effect of two levels of fertilizer N, 50 and 300 kg/ha (45 and 270 Ib/ac) on the productivity of pastures grazed by young beef cattle. Two stocking rates were imposed at the lower N level and 4 at the higher level. The responses per kg fertilizer N were approximately 1 kg liveweight gain, 20–24 Meal ME and 8–9 kg DM. Maximal yields of about 1000 kg gain/ha (890 Ib/ac) and 19,000 Meal ME/ha (7700 Mcal ME/acre) were recorded. Animal performance was similar on the low and the high N pastures. There was evidence that the chemical quality of pasture was lower on the low N pasture in the first year, but there was no difference in the second year. The numbers of dung pats per ha and the refusal of herbage due to fouling were reduced by Increasing the stocking rate.  相似文献