Abstract:This paper presents data on some microbial population numbers in wheat inner rhizosphere and in the bulk of two soil species, using comparative method,with "the total aerobacteria"as a reference to analyse the wheat rhizosphere effects.The results showed

Abstract:以２１年树龄的池杉为试材，研究了池杉纸浆材管胞形态、木材密度和化学组分含量的变异规律。结果表明：管胞长度、宽度、长宽比、壁腔比、基本密度及纤维素含量径向为递增、稳定的模式，而木素、戊聚糖、苯醇抽出物含量及腔径比等径向变异为递减、稳定的模式；轴向管胞长度、长宽比变化模式为短─长─短、小─大─小；木材密度１．３ｍ高度以上则呈递减的模式。池杉木材幼龄期为１２～１４年，其纸浆林工艺成熟龄约为１４～１８年。

Abstract:Seedling roots of Graminae, cruciferae and cucurtibaceae families were pretreated by penctin-lytic bacteria, during which root hairs were first damaged and cleared away finally. Damaged roots were separately inoculated with culture suspensions of Azorhizo

Abstract:In the present study we adopted a systematic isolation approach to obtain strains by isolating rhizobia from every nodule on the sample plants.Out of 154strains studied,100 were from 10 plants collected in the same field(designated as group A),40 were fro

Abstract:对无融合生殖水稻材料ＨＤＡＲ００２六个株系的胚胎学研究结果表明，６个株系无融合生殖胚的发生具有多源性，未受精胚的发生具有多源性，未受精胚囊内胚的发生有两种方式：即卵细胞的孤雌生殖和助细胞的无配子生殖；此外珠心细胞可直接分裂形成不定胚。无融合生殖胚的启动分裂时期为开花前２－３ｄ，其胚胎发育过程基本同正常水稻，部分材料的胚在形态上与正常水稻有差异。同时还观察到ＨＤＡＲ００２胚胎发育中的多极核现象与无胚

Abstract:通过对基本培养基的筛选和无机盐的调整，研究了小麦组培再生植株的营养需求，结果表明：再生植株在总氮为４２ｍｍｏｌ．Ｌ＾－＾１（其中铵态氮为７ｍｍｏｌ．Ｌ＾－＾１）的培养基中生长良好；２．５ｍｍｏｌ．Ｌ＾－＾１Ｃａ（ＮＯ３）２的生根效果优于ＣａＣｌ２；０．４μｏｌ．Ｌ＾－＾１Ｃｕ－ＥＤＴＡ和１μｍｏｌ．Ｌ＾－＾１Ｎａ２ＭｏＯ４对试管苗的正常生长是必需的；Ｃｌ离子浓度不宜超过１ｍｍｏｌ．Ｌ＾－＾１。形成

Abstract:本研究对矮败小麦育性，株高和鞘长三性状相互间的遗传关系进行了分析。进一步证实了太谷核不育基因（Ｍｓ２）与矮秆基因（Ｒｈｔ１０）紧密连锁，同时发现矮败小麦的短芽鞘与矮秆性紧密相关，其短芽鞘特性可作为太谷核不育基因的早期形态标记。通过短芽鞘区分可育株与不育株的准确率因组合而异，平均为８８．２％。用２０ｍｇ．ｋｇ＾－＾１ＧＡ３浸种处理可明显促进可育株芽鞘伸长，但对不育株芽鞘伸长作用不明显，从而加大可育株

Abstract:生态核不育大麦９１１１－２－３（Ｈ．ｄｉｓｔｉｃｈｕｍ）在自然条件下具有育转换特性，温度是诱导其育性转换的主导因子，在一定温度范围内低温诱导不育，高温诱导可育。抽穗前２８－１４ｄ是育性转换的温度敏感期，此时为大麦穗分化的药隔形成中期至四分体形成期。诱导育性转换的不育上限温度为１０℃，可育下限温度为１３℃。

Abstract:根据松公二孢菌７个菌株的菌落特征，子实体形态，致病力，营养生长及产孢条件，将其分为ＨＺ型和ＨＮ型２类进行观察。结果表明，来自湖南和湖北的ＨＺ型菌株致病力强，来自广东的ＨＮ型菌株致病力弱，且差异显著（α＝０．０５）。在供试培养基，ｐＨ和１５－３２℃条件下，ＨＮ型菌株菌落生长速度大于ＨＺ型菌株，气生菌丝更发达。ＨＺ型菌株与ＨＮ型菌株对高温（３６℃）和低温（１０℃）的适应性存在明显差异。光照，营养和温度

Abstract:Phenolic mixture was extract from shed leaves of Magnolia officinalis, and the action of the mixture inhibiting parasitic fungi of plant was tested on PDA medium. In addition, experiments using the extract to control plant diseases were made in potting an

Abstract:Seven upland soils, which were collected from several areas in Hubei province, were utilized to study the effects of Mo-applying on wheat growth and development at two nitrogen levels. The results are as follows: Mo could promote the growth and developmen

Abstract:Seven upland soils, which were sampled from main wheat produce areas in Hubei province, were utilized to study the effect of application of MO fertilizer to wheat on N and Mo nutritions with pot culture method. The main results are as follows : when Mo wa

Abstract:１９９１年对湖北省新洲县涨渡湖的水环境和水生物资源进行了调查。该湖平均水深１．３１ｍ，透明度平均３１．３ｃｍ，总氮，总磷含量分别为１．００４，０．１１８ｍｇ．Ｌ＾－＾１。浮游植物对光能利用率为０．１８％，牧食链中Ａ１，Ａ２，Ａ３，Ａ４的年生产能量分别为８４０９．４４，３９８．４７，４０．８，１２．１３ｋｊ．ｍ＾－＾２。Ａ２／Ａ１，Ａ３／Ａ２，Ａ４／Ａ３的能量利用率分别为４．７４％，１０．２４％，２

Abstract:研究了网湖鲢，鳙的生长特性，并以此为依据计算网湖鲢，鳙鱼种放养量，确定其合理捕捞规格。得出网湖１４．８５－１６．５ｃｍ鲢鱼种放养量为６６．１６万尾或２．４５０４万ｋｇ，１３．２ｃｍ鳙鱼种放养量为１１６．０５万尾或２．７６３１万ｋｇ鲢，鳙合理捕规格为０．５ｋｇ。

Abstract:In an apple orchard sheltered by forest belts of Paulownia,sample points were set with isodistance in four directions according to the method of Systematic Sampling. In each sample point, measurement and analysis were made with the light intensity,sunligh