小麦-玉米“双晚”栽培技术

沂水县自2009年开始推广小麦-玉米"双晚"栽培技术,提高了产量,有效避免了小麦冬前旺长,冬季和早春受冻的现象,通过试验确定了沂水县玉米最佳收获期,小麦最佳播种期。

冬小麦-夏玉米轮作“双晚”种植模式下的品种匹配与资源效率

探索适宜于麦玉"双晚"种植模式下抗逆丰产稳产的冬小麦夏玉米品种组合特性及其与自然资源匹配特征,对于保障冬小麦夏玉米抗逆丰产高效生产具有重要意义。本研究于2017—2019年通过田间试验,选用华北平原主推的冬小麦与夏玉米品种各8个,设置区域麦玉"双晚"接茬模式和水分控制处理,通过水分利用效率、籽粒灌浆特征、生育进程、周年光温水资源利用效率等综合分析与评价,探明宜于"双晚"模式下麦玉品种组配特征及其资源利用效率。结果表明,在常规节水灌溉和生育期雨养模式下冀麦325、石麦15和济麦22的产量在两个生长季均高于供试品种平均产量,其中冀麦325和石麦15的抗旱系数均高于济麦22;同时,济麦22、冀麦325和石麦15具有较高的灌浆速率、穗粒数和粒重,其高稳系数在不同灌溉模式下均高于供试品种平均值。在供试玉米品种中,登海605、伟科702、MC670、农华816的产量和高稳系数均高于供试品种的平均值,其中MC670、登海605、先玉335的灌浆速率在2个生长季均高于供试品种的平均值,而迪卡517和先玉335在供试品种中收获期籽粒含水量最低、平均脱水速率最高。基于品种丰产稳产性、抗旱性、灌浆特征和脱水特征的综合分析,筛选出周年产量和资源利用效率最高的品种组合为冀麦325-MC670,2年较对照济麦22-郑单958品种组合周年产量提高17.2%和17.9%、光、温和灌溉水利用效率分别提高18.6%和20.0%、18.1%和18.9%、17.4%和18.1%,经济效益分别增加8800元hm^(-2)和9600元hm^(-2);为适应麦玉周年全程机械化管理模式,玉米品种应组配脱水快、籽粒收获含水量低的迪卡517或先玉335,与济麦22-郑单958组合相比,周年产量两年分别提高4.7%和14.4%、光温和灌溉水利用效率分别提高5.6%和16.3%、4.7%和15.4%,5.0%和14.6%,经济效益增加2080元hm^(-2)和7080元hm^(-2)。综上所述,在麦玉"双晚"模式下,通过优化品种组合,与当前主推品种组合相比,能进一步实现周年产量和资源利用效率的协同提升。

小麦晚播精播玉米晚收双晚高产栽培技术探讨

本文通过试验探讨烟台市小麦适宜播种期、玉米适宜收获期,总结小麦晚播精播、玉米晚收“双晚”高产栽培技术,以期为高产丰产打下基础。

Effect of Different Seedling Age on the Growth and Yield of Double Cropping of Late Rice

The study aims to solve the problems of late transplanting rice with differ- ent seedling ages at the lower reaches of Yangtze River. We selected six varieties of different thermal and photo-response characteristics as the test material to study the effect of different seedling ages on growth and yield of rice. The results showed that growing period of thermal-response rice was delayed by long seedling age, but less affected by the impact of photo-response rice; the yield of later thermal-re- sponse varieties with 25 days and 30 days seedling ages was significantly reduced. In contrast, the yield of early thermal-response varieties and later photo-response varieties were significantly reduced with 30 days seedling age. The optimal trans- planting seedling age was 15 days of thermal-response rice, while photo-response rice was 20 days. The thermal-response rice should be selected as early maturing varieties, while the photo-response rice could be selected as late maturing varieties for high yield.

Effects of CMNa combined with paclitaxel and carboplatin on elevated CA125 levels in post-operation advanced ovarian cancer patients

Objective： To investigate the effects of CMNa combined with paclitaxel and carboplatin on elevated CA125 levels in post-operation advanced ovarian cancer patients. Methods： The effects of CMNa combined with paclitaxel and carboplatin on elevated CA125 levels in 25 post-operation advanced ovarian cancer patients were retrospectively analyzed and com- pared with those in 20 control cases. Results： After 1 cycle of chemotherapy, CA125 levels had decreasing trend compared with control, but had no statistical significance. While after two cycles of chemotherapy, CA125 levels decreased more rapidly compared with those in control. Side effects in two groups were alike. Conclusion： CMNa combined with paclitaxel and car- boplaline has a stronger effect on the decrease of elevated CA125 levels than paclitaxel and carboplatin have in the treatment of post-operation advanced ovarian cancer, which indicates that CMNa has chemo-sensitizing effects on chemotherapy of paclitaxel and carboplatin.

Taxonomic Revision of Late Cretaceous （Turonian） Bivalves from Narmada Basin, Central India

An attempt has been made to systematically revise the Late Cretaceous （Turonian） bivalves of the Bagh Beds, central India. Altogether, fifteen species have been described here. The two species Nicaniella （N） trigonoides ＆ Protocardia （P） laticostata, which are earlier known from Late Cretaceous of Tiruchirapalli subbasin, southern India, have been recorded for the first time from Narmada Basin. The other species recorded are： Modiolus typicus, Neithea morrisi, Plicatula batnensis, P. numidica, P. instabilis, Lucina （L.） cf. fallax, Astarte similis, Opis corniformis, Protocardia hillana, P. madagascariense, Cytherea （Callista） lancianata, Trigonocallista spathi and Pholadomya sp.. During course of systematic revision, it has been found that many species described by earlier workers from the Late Cretaceous of Bagh Beds have been found conspecific to already known species from the Cretaceous of different parts of the globe and hence, they have been recorded here as junior synonyms. These species have immense implication in the palaeobiogeography of the region.

Revision of Cyprinus maomingensis Liu 1957 and the first discovery of Procypris-hke cyprinid(Teleostei, Pisces) from the late Eocene of South China

Fossil cyprinids from the upper part of the upper Eocene Youganwo Formation of Maoming, Guangdong, China were first studied in 1957 by Liu, who referred the only specimen to the genus Cyprinus as a new species, C. maomingensis. And this was suggested as one of the earliest records for fossil cyprinids. Unfortunately, this specimen is poorly preserved and reveals no more morphological information than its serrated last unbranched dorsal and anal fin rays. Recently, some new specimens were unearthed from the same locality, where C. maomingensis was discovered. In addition to the serrated dorsal and anal fin rays, these new materials also show that the pattern and shape of their pharyngeal teeth obviously differ from that of Cyprinus but resemble that of Procypris. However, its number of the branched dorsal fin rays and number of vertebrae are much less than that in Procypris. Morphologically, these specimens are closer to Procypris than to Cyprinus. This is the first report of fossil Procypris-like fish, and it implies that Procypris-like fish is an early member of the Tribe Cyprinini sensu stricto(sensu Yang et al., 2010) and the origin of this group can be traced back at least to the late Eocene.