不同株型玉米苗期生长,光合速率及对肥料的反应

在人工气候室中，对盆栽条件下不同熟期的紧凑型与平展型玉米比较研究表明，单株玉米对土壤养分的反应株型间无规律性差异；不同熟期玉米间存在明显的规律性差异。植株苗期生长速率及高低土壤肥力下的差异与叶片Ｎ、Ｋ含量，光俣速率及不同光强，不同ＣＯ２浓度与的反应差异间存在明显的相关性。不同品种间苗期光合速率差异明显，土壤肥力高低对玉米苗期光合速率影响很大。     

Some Ideas on Reconstruction of Villages inside the City

In this paper, the historical reasons of formation of the village inside the city are analyzed. It is indicated that such situation for the villages inside the city are the result of joint action of both the villagers and the government. The foundation of villages inside the city laid on the simple compensation for farmers in confiscating the rural land and lack of intelligence aids. In this paper, the ideas and measures for their reconstruction are put forward based on consideration of the reasons of their formation and difficulties in the reconstruction.     

AN APPRONTMATE CALCULATING METHOD FOR WALL PLATES OF MAN'' S DRY GAS HOLDERS

The basic equations of wall plates of MAN' S dry gas holders are derived in this paper. According to the law of cylindrical bending given by the finite element results .we derive some approximate formula calculating the deflection and stresses of the wall plates from the basic equations. Compared with the known approximate calculating method.the method car. obviously increase the percision.     

Ecological Technology Strategy-the Typologic Analysis and Research of Double-Skin Facade

As a renovation envelope, double-skin facade has the characteristics of environmental function and unique aesthetic effect. In this paper, the composition and functional characteristics of double skin facade is introduced briefly, its development history and a detailed typologic analysis combined with typical cases is reviewed. It is pointed out that the double skin facade has a bright future in 21~(st) century and the function and aesthetics are the footstone for its typologic research.     

Structural Analysis and Discussion of Wide -stayed Bridge Basket

Based on a cable -stayed bridge girder as an example, the structure and function, the operating principle and calculation model of the main elements of the Basket of wide - stayed bridge were described in detail. A further discussion was carried out on the Basket of Cantilever construction of the main beam in the structure.     

三个不同品质类型冬小麦品种籽粒淀粉积累动态及其有关酶的活性变化

在池栽条件下，研究了3个不同品质类型冬小麦品种藁麦8901（强筋）、豫麦49（中筋）和洛麦1号（弱筋）籽粒灌浆过程中淀粉及其组分积累动态和与之有关的酶活性变化。结果表明，3个品种籽粒灌浆过程中支链淀粉的合成均与直链淀粉的合成同时进行，灌浆中后期支链淀粉的合成比直链淀粉的合成快。豫麦49籽粒中直链、支链和总淀粉积累速率均高于其它两品种。3个品种籽粒中腺苷二磷酸葡萄糖焦磷酸化酶（AGPP）、尿苷二磷酸葡萄糖焦磷酸化酶（UGPP）、可溶性淀粉合成酶（SSS）、淀粉粒结合的淀粉合成酶（GBSS）、淀粉分支酶（SBE）活性变化均呈单峰曲线。豫麦49在灌浆期上述各酶活性变化的峰值均高于其他两品种，且大部分酶类在灌浆中后期仍维持较高活性。可见，与藁麦8901和洛麦1号相比，豫麦49具有较强的淀粉合成能力。