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1.
用同一种保水剂,采取不同施用方法,探讨施保水剂与不施保水剂以及保水剂不同施用方法对甘蔗生长及产量的影响。试验前后经历3年,在2007年新植蔗施用保水剂,2008—2009年宿根蔗不再施用保水剂,结果表明,保水剂兑水处理:在新植蔗施用试验中获得极显著的增产效果,之后的两年宿根蔗试验仍增产显著。增产幅度表现逐年下降,增产效果随着施入土壤时间的延长而降低。保水剂干撒处理:3年的试验里表现出不同程度的减产。在施保水剂当年的新植蔗比对照略有减产,差异不明显;比保水剂兑水处理减产极显著。在后两年宿根蔗试验中,比对照减产明显,但差异不显著;比兑水处理减产显著。 相似文献
2.
不同时期施保水剂对甘蔗抗旱性和产量及品质的影响 总被引：5，自引：0，他引：5
在玻璃大棚槽栽条件下，分别于甘蔗下种期、分蘖初期和伸长初期每667m^2施保水剂15kg，以不施保水剂为CK，8—10月份人工模拟干旱胁迫，探索施保水剂与不施保水剂以及不同时期施保水剂对产量和品质的影响。试验结果表明，干旱胁迫期间，施保水剂土壤含水量下降缓慢，甘蔗叶片含水量较高，质膜透性和丙二醛含量较低，蔗茎月伸长量较大，蔗茎产量比CK高8．94％-12．25％，11～1月平均蔗糖分比CK高0．54～0．96个百分点。不同时期施保水剂的效果，以伸长初期施用表现最佳，分蘖期施用次之。 相似文献
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在甘蔗生长前期于叶面喷施体积分数为千分之一的植物动力２００３，具有明显的增产增糖效应。其效果表现为促进甘蔗萌芽、分蘖，提高成茎率，优化株高、茎径、有效茎、蔗糖分等工农艺性状，加强了生理生化功能，促进了生长。综合新植和宿根分析，喷施植物动力２００３的每公顷产量７５．９１ｔ，比对照增加１１．０４ｔ，增产１７．０２％；蔗糖分含量１４．１２％，比对照提高０．５３％；每公顷产量１０．７３ｔ，比对照增糖１．９ｔ，增幅２１．４％。统计分析表明产量及产糖量差异达极显著水平。 相似文献
4.
研究结果表明，尿素混2％和3％脲酶抑制剂可使甘蔗生长加快，有效茎数增多，比不混脲酶抑制剂的对照平均每公顷增产蔗茎7854kg(n=93)，增产率9．55％，达到统计显著水准，每公顷增农业纯收入1395元，可减少施肥用工45个，节省尿素用量20％左右。 相似文献
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盆栽试验结果表明，氯化钾和硫酸钾均能提高马铃薯叶绿素含量，块茎产量较对照增加显著。供试两种钾肥对马铃薯淀粉含量有增加作用，但对维生素C含量有降低趋势。田间试验结果表明，钾肥具有增加大、中薯，降低小薯比例的效果，从而提高商品率。在海伦黑土上，每公顷施氯化钾52．5～202．5kg，增产块茎6．8％～17．6％。在富锦黑粘土上，每公顷施等量的氯化钾，增产块茎6．5％～20．0％。 相似文献
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本文研究了黄淮海地区接种根瘤菌和接菌时配施磷、钼肥对花生产量的影响。花生接种根瘤菌比不接菌对照每公顷增产２６８．５ｋｇ，提高７０％；接菌时配施磷肥增产４５４．５ｋｇ，提高ｌｌ．８％；磷钼肥配施增产３７２ｋｇ，提高９．６％；接菌时施钼和接菌处理相比，增产效果不明显。结果还说明，接菌和接菌配施磷钼肥可增加根瘤数量、重量和干物重等。 相似文献
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广西甘蔗研究所1996年从墨西哥引进桂引9号（原名Mex105）。经多年多点试验,该品种表现早熟、高产、高糖,宿根性好,抗病性强,在广西蔗区区域试验中,公顷产蔗量92．3t,比对照种新台糖16号增产12．2％,平均蔗糖分16．08％,比新台糖16号增1．23％,公顷含糖量为14．8t,比新台糖16号增糖21．4％,增产增糖效果显著。高产栽培上侧重于增加有效茎数和提高蔗株的高度。每公顷产蔗量90-120t的合理群体结构为：公顷有效茎为7.00-7．85万条,株高297-325cm,茎径2．53-2．71cm。 相似文献
8.
闽糖８６／３３０是福建省农科院甘蔗研究所培育成功的高产、高糖、稳产的甘蔗新品种。１９９１－１９９６年在漳州市芗城区石亭镇示范推广面积１６７公顷，平均每公顷产蔗１１６．０５吨，比当家对照种闽糖７０／６１１夺产１７．２％±，增产效果达极显著水平。５吨，比当家对照种闽米７０。６１１产１７．５２％，增效果达到 相似文献
9.
丰岭牌多元素复合肥肥效试验 总被引：6，自引：0，他引：6
试验结果表明．甘蔗施用丰岭牌多元复合肥增产显著．比普通复合肥和高美施复音肥每667平方米增产288公斤和266公斤。分别增长5.1％和4.7％;增糖明显．甘蔗蔗糖分比普通复合肥增加1.00％．比高美施复合肥增加0.25%(绝对值)。 相似文献
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针对豫北地区的大豆生产现状，从气候、土壤、品种、生态因素及市场需求等方面提出了优质大豆的发展策略与途径。 相似文献
12.
以长沙县高桥相同嫩度茶鲜叶原料采用卷曲形毛尖茶加工工艺制绿茶为对照,分别对沅陵县齐眉翠峰、凤娇碣滩茶、干发茶和军大坪茶4种绿茶的主要生化成分与感官品质进行初步分析。结果表明,沅陵4种绿茶的茶多酚总量28.76%~30.34%,游离氨基酸总量2.35%~3.22%,咖啡碱含量3.00%~3.63%,水浸出物含量37.26%~40.07%,可溶性糖总量5.46%~5.65%,可溶性蛋白含量1.50%~1.74%,类黄酮化合物总量1.16%~1.79%,叶绿素总量1.36%~2.01%,儿茶素总量13.53%~16.20%。与对照相比,4种绿茶的茶多酚、可溶性糖和儿茶素总量均高于对照,除齐眉翠峰外其余3种茶样水浸出物和叶绿素总量均高于对照,除干发茶外其余3种茶样类黄酮化合物总量均高于对照。 相似文献
13.
Sena L.P. VanderJagt D.J. Rivera C. Tsin A.T.C. Muhamadu I. Mahamadou O. Millson M. Pastuszyn A. Glew R.H. 《Plant foods for human nutrition (Dordrecht, Netherlands)》1998,52(1):17-30
In the western Sahel, indigenous plants become important staples when cereal harvests are inadequate to support populations inhabiting that region of Africa. The purpose of this study was to assess the nutrient content of several of these edible wild plants. The leaves of the following seven plant foods were analyzed: Ziziphus mauritiana, Cerathotheca sesamoides, Moringa oleifera, Leptadenia hastata, Hibiscus sabdarifa, Amaranthus viridi, and Adansonia digitata. The fatty acid, vitamin E, carotenoid, selected mineral and amino acid contents of these plant foods were determined. These same analyses were performed on the fruit of the Adansonia digitata. In quantitative and qualitative terms, Amaranthus viridis was found to be an excellent source of protein. Its amino acid composition compared favorably to that of a World Health Organization (WHO) protein standard. It also contained considerable amounts of the two fatty acids that are essential in humans (linoleic and -linolenic) and a number of minerals including iron, magnesium, calcium and zinc. The leaves of Hibiscus sabdarifa contained an appreciable quantity of protein the composition of which was comparable to the WHO standard. The mineral content of the leaves of this plant was also exceptionally high; noteworthy was its high zinc content. H. sabdarifa also contained significant quantities of the two essential fatty acids. Ziziphus mauritiana was an excellent source of the essential fatty acid linoleic acid and several of the metals including iron, calcium, magnesium and zinc. Its content of other essential nutrients, however, was rather low. In general, Adansonia digitata leaves were nutritionally superior to the fruit of the tree; however, the fruit did contain useful quantities of potassium, phosphorus, zinc and -linolenic acid. The Leptadenia hastata leaves were an especially good source of lutein and -carotene. These data should be useful to the people who inhabit the western Sahel in helping them devise healthy diets during times when cereal staples are in short supply. 相似文献
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通过电解质外渗法和匍匐茎恢复试验对‘阳江’狗牙根及其12个通过形态鉴定选出的坪用价值高且花序密度低的诱变后代进行抗寒性鉴定。电解质外渗法结果表明:诱变后代间的抗寒性具有较大差异,其叶片半致死温度(LT50)的变异范围为-7.6～-0.2℃(最低值与最大值相差7.4℃);参试材料抗寒性由强到弱依次为M18>M4>M26>M28> M22>阳江>M29>M31>M10>M37>M16>M1>M25,其中,有5个诱变后代抗寒性优于亲本,分别是M18、M4、M26、M28、M22。匍匐茎恢复实验结果表明:诱变后代M1、M22、M26、M31、M25在0℃和-5℃低温胁迫后的恢复生长率都高于亲本,恢复能力均优于亲本;M10、M37、M28在-5℃低温胁迫下,恢复生长能力低于亲本,抗寒性相对较弱,M16和M4在0℃和-5℃低温胁迫下,恢复生长率都低于亲本,抗寒性明显弱于亲本。综合2种方法鉴定结果显示:诱变后代M1、M25的恢复能力较强;M4、M28的叶片抗寒性较好,青绿期较长;M22、M18、M26的叶片抗寒性和匍匐茎恢复能力均较强;M29,M31的叶片抗寒性和匍匐茎恢复能力与亲本相似;M10、M16、M37的叶片抗寒性和匍匐茎恢复能力均较弱,整体抗寒性较弱。 相似文献
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1 吉林省平安农业科学院大豆研究工作简介吉林省平安农业科学院大豆研究所 ,设在吉林省长春市西安大路种子大厦内。现有科技人员 6人 ,其中研究员 2人 ,农艺师 2人 ,技术员 2人 ,定向培养研究生 2人。大豆研究所的主要任务是选育稳产、高产、优质及抗病虫大豆新品种 ;同时密切 相似文献
17.
Irrigation of Netted Gem potatoes was scheduled during three growing seasons by three methods: (a) when plants displayed first visual symptoms of moisture stress, (b) when indicated by a soil moisture budget involving estimated evapotranspiration, and (c) on the basis of tensiometer readings of soil moisture suction. When the tensiometer method of scheduling was used, the mean yields of tubers were 55.0 and 25.8 cwt/acre (6160 and 2890 kg/ha) higher than those obtained with the other two scheduling methods. Methods did not affect the specific gravity of potatoes. Method (a) scheduled irrigations least frequently. Scheduling by the budget method was not always adequate because it was based on the assumption that the crop extracted water from a constant 4 ft (1.2 m) profile from planting to full vegetative growth. In one year the budget method scheduled the first irrigation earlier than necessary and delayed the second irrigation during a critical period of crop growth. From full vegetative cover to harvest the irrigation schedules were alike for both the budget and tensiometer methods. 相似文献
18.
M. D. Harrison Gestur Johnson R. D. Barmington 《American Journal of Potato Research》1970,47(10):386-393
A broadcast application of PCNB (Terraclor) resulted in a reasonably uniform distribution of the chemical in the soil with the concentration decreasing in a linear fashion with increasing depth in the soil profile. A banded application resuluted in a considerably higher chemical concentration at the 4–6 inch depth than at the 0–2 or the 2–4 inch depths. The problem of the lack of uniformity of chemical distribution could probably be solved by altering nozzle placement and size and allow use of the band method of application to minimize grower cost. More complete disking in the case of the broadcast treatment would probably result in a relatively uniform distribution of the chemical but at higher cost to the grower. PCNB application rates of 10, 15 and 25 lbs per acre broadcast and 71/2, 10 and 121/2 lbs per acre in a band significantly reduced the severity ofRhizoctonia infection of Russet Burbank potatoes but did not increase potato yields significantly. 相似文献
19.
P. Mésochina W. Martin-Rosset † J.-L. Peyraud ‡ P. Duncan § D. Micol† S. Boulot¶ 《Grass and Forage Science》1998,53(2):189-196
Data from in vivo digestibility trial with four to six horses fed twenty-seven forage-based diets are used to calculate prediction equations for the digestibility of dry and organic matter, based on the crude ash (CA), crude protein (CP) and crude fibre (CF) contents of diets and faeces. The most precise prediction of dry-matter digestibility (r.s.d. = 0.032, R2= 0.80) was derived from a multiple regression including faecal (CP, CF) and dietary parameters (CF). Among faecal parameters, CP was the best single predictor of both digestibility (r.s.d) = 0.040, r2= 0.63) and dietary CP content (r.s.d = 0.028, r2= 0.59). For biological reasons we propose a non-linear model that allows prediction of dry- and organic-matter digestibility from faecal CP Content with reasonable Precision (r.s.d = 0.038, 0.036, r2= 0.65, 0.74, respectively). This will be adequate for many studies, especially for free-living animals in rangelands. 相似文献
20.
橡胶树丛枝病病原的抗血清制备与应用 总被引：5，自引：1，他引：4
以感染橡胶树丛枝病病原的长春花为材料,制备得到橡胶丛枝病病原菌抽提液,以抽提液为抗原免疫家兔,制备抗血清,经微量沉淀测定,抗血清效价为１：２０４８。应用橡胶丛枝病抗血清检测橡胶褐皮病,无症苗木检出率达３０％－３７％,可疑的褐皮病树检出率达８５．７％。 相似文献