松嫩平原黑土区不同培肥途径对产量影响的初步分析

研究结果表明，不同培肥途径多年产量的平均结果较对照增产．农肥不仅提供作物所需养分．并显著地提高土壤生态系统稳定性．化肥高量区与低量区产量的平均结果变动幅度较小．干旱少雨年份，农肥作用大于化肥；雨量充沛年份，化肥的作用大于农肥．秸秆还田量在一定地区有一定上限，过高会出现负效应，加剧了干旱程度，配施农肥、化肥能够缓冲这种负作用、并定量地给出高产的最适施肥配比．     

恩肥对平菇菌丝生长,产量及品质的影响

本文报道了恩肥的施用浓度、施用时期对平菇菌丝生长、产量和品质的影响。试验结果表明,施用恩肥可促进平菇菌丝生长和子实体发育,有利于提高产量及改善品质。用肥量为每1000ml PDA或每公斤干培养料0.2～0.3ml时,菌丝生长速度显著加快,长满袋的时间可缩短4～5d,子实体产量可提高45.7％～55.9％,蛋白质、必需氨基酸和非必需氨基酸分别增加25.8％、14.94％和11.32％。在不同施肥时期中,又以现蕾期喷施效果最佳。     

Seasonal growth and diet of juvenile chinook salmon (Oncorhynchus tshawytscha) in demonstration channels and the main channel of the Waitaki River, New Zealand, 1982–1983

Abstract– Juvenile chinook salmon in the Waitaki River, New Zealand and demonstration channels, living at about 16°C, increased in length by 0.32 mm day⁻¹ between 4 November and 4 March. They gained weight quickly, accumulated large visceral fat deposits and had high conditions factors. At 1600 h, stomachs averaged half full. The number of prey tended to decline as the fish grew and consumed larger items. Initially the diet was based mainly on chironomid larvae, but by December it included a diversity of prey in more equal proportions. These included Deleatidium in the Waitaki; amphipods in the demonstration channels; various trichopterans, hemipterans, elmid beetles, zooplankton. terrestrial dipterans and a variety of other prey. There were significant differences between sites in numbers of prey consumed and these probably reflected differences in the benthos. Diets in the Waitaki differ from those in the Rakaia River and the food of juvenile salmon appears closely linked to the availability of a diverse range of possible prey.     

竹缺爪螨实验种群生命表的研究

在25℃温度条件下，用黄金间碧竹（Bambusa vulgaris cv.vittata)叶饲养竹缺爪螨（Aponychus corpuzae Rimando)，应用生存分析理论和多维矩阵模型组建竹缺爪螨种群生命表，计算得种群主要参数为：内禀增长率rm＝0．0811，净增殖率R0＝5．8368，平均世代长度T＝21．7532d，周限增长率λ=1.0845/d；并分析了种群在不同年龄的生命状态，各发育期重叠情况以及稳定的年龄一阶段分布；最后讨论了应用这2种方法组建螨类生命表的优点。     

果树自交不亲和性的遗传与生理机制及其研究

在简要介绍植物（包括果树）自交不亲和性与生理控制机制的基础上，着重对梨、苹果、杏等果树自交不亲和性的研究进行了综述，内容包括花柱内花粉管生长特点、花柱S糖蛋白的特性与作用机理以及果树自交不亲和的分子生物学研究，并提出了该领域有待研究的问题。     

O,O-二烷基-N-莰-2-基(硫)磷酰胺酯的合成

合成了14个含有 N-莰-2-基的磷酰胺和硫代磷酰胺类化合物,用红外、核磁及元素分析确定其结构,并探讨了~(31)Pδ值的规律性变化。初步生物试验表明,磷酰胺类化合物对水稻发芽具有明显的抑制作用,其中化合物Ⅱ1的活性大于对照药剂抗倒胺但低于多效唑。     

森林可燃物的燃烧性与化学组成

从五种针叶树叶(白皮云杉、红松、兴安落叶松、黑皮油松、樟子松)以及六种阔叶树叶(柳树、白桦、杨树、黄波罗、水曲柳、蒙古栎)的春季和秋季样品的水分、灰分(水溶性和水不溶性)、醚抽提物、含氮量、含磷量的分析得出:兴安落叶松和柳树的可燃性最小。这一结果与热重分析所得结果相符合。     

Follicullar Development and Embryo Recovery Following 3 versus 8 FSH Injections in Heifers

Ovarian follicular dynamics and embryo yield were studied during 2 different FSH regimens for superovulation of cattle. Twenty heifers were given intramuscular injections of FSH (total of 35 mg NIH) either once daily for 3 days (Group 3×1) or twice daily for 4 days (Group 4×2). At 72 h after the first FSH injection, each animal was injected with 0.75 mg cloprostenol. Inseminations were performed at 12 h and 24 h after the onset of heat. Transrectal ultrasonography was performed on the day of the first FSH injection, the day of cloprostenol injection, the day of insemination and finally on the day of embryo recovery (day 6 or 7 after heat). The numbers of small (2–4 mm), medium (5–9 mm) and large (>10 mm) size follicles were recorded. The total number of corpora lutea, eggs and transferable embryos were recorded on the day of embryo recovery. No differences were found between the 2 groups in either of the parameters studied (p>0.05). It can be concluded that treatment with this FSH preparation once daily for 3 days gives a folliculogenic and superovulatory response similar to a treatment regimen where it is given twice daily for 4 days.     

青海血蜱不同发育阶段蛋白分析

考虑到不同发育阶段蛋白多肽及抗原特性方面的差异,本实验利用SDS-PAGE和Westernblotting对青海血蜱的卵、幼蜱、若蜱、成蜱的蛋白进行了分析。SDS-PAGE结果显示,卵出现了7条主带,幼蜱出现了16条主带,若蜱出现了14条主带,成蜱出现了12条主带。它们的蛋白多肽在数量、含量和分子量上存在差异,共同带只有4条,但相邻发育阶段之间的共同带较多。用感染羊血清和免疫羊血清作免疫印迹时,感染羊血清在分子量5.6万处有明显的反应带,免疫羊血清在分子量9.7万处有明显的反应带。