Abstract:Three new taxa of Sterculiaceae are described , Fimiana danxjaensis occurs in Danxia Shan of Guangdong Province. It grows on the slopes of rocky hills and sometimes cultivated as an ornamental ,Sterculia yuanjiangensis occurs in Yuanjiang County of Yunnan Province. Sterculia nobills var. subspontanea is known in Southwestern of Guangxi Province. It grows in evergreen forest on limestone hills.

Abstract:本文试图利用~(60)Coγ射线辐照诱发美人蕉(Canna indica L.)突变,选育矮化可供盆栽观赏的美人蕉新品种。研究结果表明,~(60)Coγ射线处理大花红美人蕉,V—M_1代出现有利突变率较高,从中获得3个各具特点的突变体,编号为:华美81—1、华美81—2和华美81—3,经四代观察性状稳定。其中华美81—1属矮化细叶型,适宜盆栽观赏;华美81—2属半矮化型,地栽不会倒伏;华美81—3属花色突变型,红黄双色花,鲜艳夺目。目前正在繁育推广应用。

Abstract:生姜(Zinglber officiale Roscoe)多数种植于中国南方各省。生姜通常在冬末收获并于室温下贮藏数月,但贮藏期因发芽而致降低商品价值。为解决这一问题,我们进行了辐照保藏生姜的研究,研究结果表明:①用2—3×10~4 rad辐照生姜,可有效地抑制贮藏期生姜发芽,经辐照的生姜在室温条件下贮藏3～4个月不发芽,②经2—3×10~4 rad辐照的生姜,其蛋白质、脂肪、碳水化合物、维生素C及17种氨基酸的含量均与未辐照的生姜无明显差异;③辐照保藏的生姜经品尝评定表明,其味道、颜色接近于新收获生姜;④经初步的经济效益估算辐照处理的生姜每100kg可得纯效益20～30元。

Abstract:The structure of CSGR-1 (a Computer Simulator of Groundnut Rust,No. 1) is described in detail with the result of its validation test. The comparison of the results of the tests of total simulation outputs and the observed values in field with several statistical methods showed that the structure and behivor of the model is reliable. Two methods, confidence range of linear parameters and accuracy analysis,were introduced into the validation test of the model. The former resembles to a certain extent the t-test of linear parameters in a theoretical sense but the conclusion obtained is more directly percievable than that of t-test, and the latter is a mild method which only presents a parameter of accuracy, giving no definite, positive or negative, statistical conclusion.

Abstract:In this paper, 10 species representing 4 genera of Trib. Aglaieae from China were studied by means of numerical taxonomic methods. Thirty morphological characters were used. The distance coefficients were computed by standized data. Based upon these, the UPGMA clustering method was performed and its results were shown in the form of dendrograms.By means of numerical methods the following taxonomic treatments, relating to the data obtained from morphological and anatomical researches, are proposed. (1) The genus Amoora Roxb. should not be combined with the genus Aglaia Lour. , but kept as an independent one, (2) A phanamixis grandifolia B1. =A.polystachya (Wall. ) R.N.Parker var. grandifolia (B1. ) X. M. Chen,comb. nov. ;(3)Aphanamixis sinensis How et T. Chen should be considered a separate species.

Abstract:The effects of iron in the sewage irrigation water flowing into the field on rice growth have been scarcely reported. This pot culture experiment aims at the effects of the sewage water with different concentration of iron on the soil pH, the contents of soluble and exchangable ferrous iron, the iron contents of the plant,the rice growth and yield. During two crops,it was found that the yield was remarkably reduced when the iron content in the sewage water was more than 1000 ppm; there was a tendancy of yield reduction when the iron content was between 600 and 800 ppm; no remarkable effects were observed when the iron contene was less than 600ppm;when the rice suffered from ferrous iron torxcity, disease occured at the middle part of the older leaf sheath. The iron content in the brown rice in the second crop was 4 to 9 times as that in the first crop.

Abstract:测定了桑树嫩叶、成熟叶、老叶的干物率、pH值,主要成份含量及它们之间的比率;观察了在超过28℃的家蚕发育适温上限的高温环境(30～31℃)中这三种不同成熟度的桑叶对二化性家蚕五龄幼虫生命力和茧经济性状的影响,用家蚕生长曲线数学模型分析了上述温度和桑叶条件下家蚕五龄期的生长发育。

Abstract:估算了甘蔗(Saccharum officinarum L.)三个主要经济性状的遗传相关及其与环境互作的大小。结果表明,每英亩蔗产量与每英亩糖产量有强的基因型相关,而与每吨蔗的糖产量却没有这种关系。遗传参数的分析还表明,每英亩蔗产量具有最大的遗传进度,而每吨蔗的糖产量重复力最大。故甘蔗品种改良中,同时提高品种单位面积的蔗产量和单位蔗量的糖产量是可获得的。因子分析的结果说明,每英亩蔗产量和每吨蔗的糖产量之基因型方差都达显著水平;不同土壤类型和新植蔗及宿根蔗的互作都影响着每英亩蔗产量、每英亩糖产量和每吨蔗的糖产量的表型方差。因此,在甘蔗育种中要提高育种最后阶段的选择效率,排除环境因子的影响是很重要的。

Abstract:Four genie models controlling hybrid sterility in cultivated rice are reviewed in the present paper:(1) duplicate gametophytic lethal, (2) one locus sporo-gametophytic interaction; (3)one locus sporophytic sterility, and(4)complementary sporophytic sterility. The possibility of overcoming the hybrid sterility in cultivated rice by the use of wide-compatibility gene(a) and specific-compatibility genes is discussed.

Abstract:The present status of research on radiology of the spine of large domestic animal are reviewed.Apart from studies on the radiographic technique and the normal radiographic anatomy of the spine, some conditions, including congenital deformities of the spine, fractures and dislocations, osteoarthritis of the spine and ossifying spondylosis, and crowding and overriding of the dorsal spinous processes, were studied for diagnostic purposes.The clinical and radiographic signs are also briefly described.