Genetic Analysis on Overwintering Character of Glutinous Rice 89-1

This article discusses the overwintering ability and genetic variation of the main agronomic traits in a new germplasm resource, glutinous rice 89-1. Survival rates of overwintering axillary buds and stems were observed in different altitudes. The F1, backcross F1 and F2 populations were constructed from sexual crossing between glutinous rice 89-1 and Hongmangnuo, Fuhui 838, Minghui 63, Ce 64. The overwintering ability and genetic variation of the main agronomic traits were analyzed in different seasons. Results showed that glutinous rice 89-1 could overwinter by axillary buds in low temperatures at different altitudes. Axillary buds would ratoon in the following year. The survival rates of rice stem and axillary buds were 82.6 and 29%, respectively. The grain yields were 6 291.0 kg ha^-1 in the overwintering ratooning season, and corresponded in the main season. Genetic analysis and chi-square test showed that the overwintering ability of glutinous rice 89-1 was likely controlled by polygene, and heritabilities showed diversity in different hybrid combinations. The highest heritabilities of 1 000-grain weight and plant height were in the main crop season, whereas the lowest were in the overwintering season, and the heritabilities of grain numbers per panicle and the seed setting rate reached the highest in the ratooning season. The spikelets per panicle, the seed setting rate, the 1 000-grain weight, the plant height, and the spikelet length had nearly normal distribution in F2 populations of glutinous rice 89-1/Minghui 63, but the seed setting rate had bimodal distribution. Overwintering glutinous rice 89-1 was a useful new genetic germplasm resource.     

甘蔗越冬贮藏的方法

甘蔗食用时间较长,一般可延续到来年的清明时节,而且甘蔗经入窖贮藏一段时间后味道更鲜美。下面结合实践经验,谈谈甘蔗越冬贮藏的方法。1.甘蔗贮藏窖址的选择甘蔗窖宜选择地势高低适中、易排水、太阳能照射到的地方。要确保窖中不积水,防止冬天窖面冰冻。2.甘蔗窖开挖技术要点     

枣园绿盲蝽越冬卵的分布及其孵化规律研究

【目的】研究绿盲蝽越冬卵的分布及其孵化规律,为掌握绿盲蝽卵的防治时间、防治地点以及制定防治措施提供依据。【方法】分别选取沧县高川乡朴寺村和盐山县城关镇的纯枣园及苹果-梨-枣混合枣园,调查2类枣园绿盲蝽越冬卵的分布情况,并将越冬卵带回室内饲养观察其孵化规律。【结果】在纯枣园,绿盲蝽卵的越冬场所主要为夏剪剪口、多年生枣股和其他伤口;在杂草、农作物残留物、1年生枣股以及土壤中未发现绿盲蝽越冬卵的分布。在枣-梨-苹果混合枣园,越冬卵在枣树上分布最多,占总卵量的50.40%,其次为苹果和梨树,越冬卵分别为总卵量的35.29%和14.31%。4月份采集的绿盲蝽越冬卵的孵化率最高,其孵化率达到87%以上,与其他月份采集卵的孵化率有极显著差异;绿盲蝽越冬卵的孵化盛期在4月末至5月初,此时枣芽长度一般为2~3 cm。【结论】绿盲蝽越冬卵主要集中分布在枣树的夏剪剪口和其他伤口,在杂草、农作物残留物1、年生枣股以及土壤中无分布,其孵化盛期在4月末至5月初。     

栀子花的安全越冬管理

1入室时间及温度管理 霜降前后,栀子花应移入温室或保护地设施中保温,进行加温养护.     

油松毛虫越冬幼虫上树下树历期的预测

通过1984～1986年对越冬幼虫的系统调查数据,分别求得油松毛虫越冬幼虫上树历期约为51d;下树历期约为87d;上树高峰期为每年的3月28日～4月19日;下树高峰期为每年的10月份。并同时对越冬幼虫上树过程中的物候学进行了观察。     

中国板栗和朝鲜板栗引种越冬新技术

为了解决板栗南种北移时的关键一一栗苗越冬春成活问题,本文通过试验提出三种新技术:秋未对栗苗地上部分喷松香、喷波尔多液、穴面覆地膜。结果,越冬率均达95％以上。为板栗及其它树种的引种工作开辟了新途径。     

怎样种好越冬菠菜

秋季天气凉爽,对菠菜生长非常有利。菠菜生长适温为10℃~20℃,能长期耐0℃以下低温,但是不耐热,25℃以上生长不良。遇长日照抽苔开花。秋季播种,由于生长期处于短日照下,当年不抽苔,可以长成较大植株。越冬菠菜是早春的主要蔬菜,不但产量高,供应早,而且收益大。但常因返青初期死苗和抽苔过早而减产。因此,保苗和延迟抽苔措施是关键:     

杂交杏李主要食心虫的发生及综合防治

主要食心虫的危害症状及发生规律 1.李实蜂 以幼虫蛀人幼果核部,不仅食尽果核,果肉亦多被食空,内积虫粪,常造成90%的虫果,被害果发黄大量脱落.该虫1年发生1代,以老熟幼虫在10厘米深的土层中或土面裂缝间及土块下结茧越冬.     

日本丸茄越冬嫁接优质栽培技术

从栽培设施、嫁接育苗、水肥管理、温度、光照、植株的调控和采收、贮存、运输等方面总结了冬季生产出口优质丸茄的技术措施。     

适合北方冬春茬的黄瓜

日光温室专用品种。植株长势强，茎粗壮．侧枝较少，耐低温。耐弱光，商品性好。瓜长35厘米左右。刺瘤适中，瓜腔小，果肉淡绿色。口感脆嫩。高抗黄瓜枯萎病、霜霉病、白粉病和黑星病。该品种适合北方地区日光温室越冬栽培和冬春茬早熟栽培。