复合图书馆的信息服务探讨

复合图书馆作为图书馆的一种发展形态，有其自身的特点和要求，有许多值得研究的内容。复合图书馆的读者服务工作是图书馆工作的出发点和各项业务工作的最终价值体现。文章分析了目前图书馆读者服务工作面临的形势，探讨了我们应采取的措施。     

Radiation Balance Components of Maize Hybrids Grown at Various Plant Densities

Components of the energy and heat balances were examined in two maize hybrids grown at three different plant densities (40, 70 and 100 thousand plants per hectare). One of the hybrids was drought tolerant, while the other was bred for cultivation under irrigated conditions. An increase in plant density influenced not only the size of the leaf area, but also the distribution of the leaves at various plant heights. The extinction coefficient, which provides a quantification of radiation penetration, was higher in the irrigated treatments. By contrast to the other two treatments, the plant canopy in the thinly sown stands remained open throughout the vegetation period, and thus behaved quite differently to the closed stands, making it impossible to compare them. Smaller albedo values were recorded for the hybrid bred for irrigation and in thinly sown stands. The low plant density allowed more energy to reach the soil, from which it was reflected, making a considerable contribution to the final temperature in the stand. The latent heat, in keeping with the quantity of water transpired, was the greatest in the densely sown stands. There was little difference between the latent heat values of the normal and dense stands in either hybrid, indicating that they both had a similar sensitivity to increased stand density. If sufficient water is available it would appear that the stand density could be increased even for the drought-tolerant hybrid.     

N_(98s)×特青(亚种间杂交稻)抽穗后物质生产及分配特点研究初报

对N×特青示范田中试区与肥料试验田各处理小区稻株分析结果表明:抽穗后,亚种间杂交稻N×特青比常规稻特青干物质生产能力强,灌浆速度快;地上部各器官占植株干重比例,前者叶片比重大于茎,后者茎比重大于叶。亚种间杂交稻对肥料反应敏感,抽穗后,干物质累积,植株高度,每穗总粒数和粒重均随施肥量增加而增加,在高肥区有利于进一步提高产量,但增施氮肥后,灌浆速度明显滞后。     

Effect of Nitrogen Rate and Stubble Height on Dry Matter Yield,Crude Protein Content and Crude Protein Yield of a Sorghum–Sudangrass Hybrid[Sorghum bicolor (L.) Moench × Sorghum sudanense (Piper) Stapf.] in the Three‐Cutting System

In this study, the effects of nitrogen (N) rate (60, 120, 180 and 240 kg N ha^?1 applied in three equal dressings at seeding and after the first and second cuttings) and stubble height (7, 14 and 21 cm) on the dry matter (DM) yield, crude protein (CP) content, and CP yield of a sorghum–sudangrass hybrid [Sorghum bicolor (L.) Moench × Sorghum sudanense (Piper) Stapf., cv. Pioneer 988] in the three‐cut system was investigated. The N rate had no significant effect in the first and third cuttings, but in the second cutting DM yields increased significantly with increase in N rate. The highest yield of 9.1 t ha^?1 was obtained with 80 kg N ha^?1 for the average of 2 years at the second cutting, but no significant difference was found among the 40, 60 and 80 kg N ha^?1 rates. CP content and yield were not significantly affected by N rate at the first and third cuttings, but CP content and yield were significantly affected by application of N at the second cutting. Stubble height had a significant effect on CP content at the third cutting. However, it had no significant effect on CP content at the first and second cuttings. Stubble height had a significant effect on the CP yield at the first cutting, but no significant effect on CP yield at the second and third cuttings.     

加快淮北地区杂交粳稻发展的几个问题

回顾了淮北地区十多年来杂交粳稻示范推广的发展过程，分析了影响杂交粳稻发展的主要原因，并论述了加快该地区杂交粳稻发展的几个主要问题。     

珍黄88(湘椒29号)辣椒的选育

珍黄88的母本6427是从广西地方品种经自交纯化而成的优良黄皮尖椒自交系;父本8215为叶少、部分茎节短缩、肉厚疏松的辣椒高代自交系。该品种中熟,定植至采收青椒约50 d(天),产量2500～2800 kg·(667 m~2)~(-1),抗病毒病,中抗疫病,适于山东、广东等黄皮尖椒外运基地栽培;果实长牛角形,果表黄绿无皱,果型直,肉厚腔小,商品性好,耐贮运。     

早熟春大白菜新品种三园春皇的选育

从北京、天津引进的大白菜品种中选育出两个自交不亲和系 90 2和 90 7,继而配制成春大白菜一代杂种三园春皇。该品种早熟 ,生长期 6 0～ 6 5d(天 ) ;一般 6 6 7m2 产量 40 0 0～ 6 0 0 0kg ,比对照鲁春白 1号增产16 % ;抗病毒病和霜霉病 ,对软腐病的抗性与对照相近 ;叶球橄榄形 ,质地脆嫩 ,品质优良。单球质量 2～ 2 .5kg     

干椒新品种蓉椒6号的选育

自交系9804和9909杂交配制成杂交一代干椒，植株生长旺盛，座果力强，较抗病毒病和疫病，果实指形，纵长17～19cm，横径1．2cm，青熟果绿色，老熟果鲜红色，单果重8．3g，味辣，品质佳，中熟品种，从定植到采收55d(天)，一般每667m^2产1500～1900kg。     

控释氮肥运筹对钵苗摆栽籼粳杂交稻甬优1540产量及氮肥利用的影响

研究籼粳杂交稻钵苗摆栽超高产栽培模式下适宜的控释氮肥运筹。试验于2016—2017年在安徽庐江进行,以当地高产籼粳杂交稻甬优1540为供试品种,设置控释氮肥一次性基施(single basal application of CRNF, BC)、与尿素分蘖肥配施(basal application of CRNF combined with urea top-dressing at the tillering stage, BC+TU)、与尿素穗肥配施(basal application of CRNF combined with urea top-dressing at panicle initiation, BC+PU)三种运筹模式,以尿素分次施肥(conventional high-yield fertilization,SU)和不施氮肥(0N)为对照,研究控释氮肥运筹对钵苗摆栽籼粳杂交稻产量、氮肥吸收利用及相关农艺指标的影响。结果表明,控释氮肥阶段释放基蘖肥:穗肥比例为7∶3,较传统优化氮肥运筹SU (6∶4)整体表现基蘖肥冗余,穗肥不足,因而BC和BC+TU处理显著降低了钵苗摆...     

杂交粳稻食味品质的遗传及相关分析

以9个新育成的BT型粳稻不育系和5个恢复系为亲本,采用p×q不完全双列杂交（NCⅡ）设计配制45个杂交组合,对其F1代食味品质性状进行遗传及相关分析。结果表明：食味品质性状同时受加性效应和非加性效应的影响;食味值与直链淀粉含量和蛋白质含量呈极显著负相关;在产量性状方面,食味值与实粒数、结实率极显著相关,各产量性状对食味品质性状均存在较大的影响;关于叶型对食味品质的影响主要是倒1叶的长宽、倒3叶的宽度以及倒1叶、倒2叶的基角开角,而叶片厚度、倒2叶长宽、倒3叶的基角开角的影响微弱。