共查询到20条相似文献,搜索用时 484 毫秒
1.
2.
《耕作与栽培》2021,41(3)
试验以红缨子高粱为实验材料,通过大田试验研究不同有机肥施用量对高粱产量和效益的影响,从而获得最佳施用量。结果表明,当有机肥施用300kg·(667m~2)~(-1)时,高粱产量为251kg·(667m~2)~(-1),产值1 760元·(667m~2)~(-1),肥料成本387元·(667 m~2)~(-1),收益1 373元,边际成本129元·(667m~2)~(-1),边际产量72kg·(667m~2)~(-1),边际效益502元·(667m~2)~(-1),边际收益373元·(667m~2)~(-1),在9个处理中表现最高。说明施用量300kg·(667m~2)~(-1)能获最佳效益和最高边际效益,该施用量既能获得较高效益,又能保持耕地地力,值得推荐使用。 相似文献
3.
1科学施用肥料,提高土壤肥力
增施有机肥,高产田施有机肥3000~4000kg/667m2、中低产田施有机肥2500~3000kg/667m2.在增施有机肥的基础上,合理施用化肥,调整好氮磷配比,适当增施微量元素肥料.底肥中化肥施用量一般地块施标准氮肥25~30kg/667m2,标准磷肥30~50kg/667m2,钾肥10~15kg/667m2,锌肥1.5kg/667m2.在小麦播种时,用适量的速效化肥作种肥,有明显的增产作用,施用种肥要以氮肥为主,配合施用磷肥,严格控制用量,1.5~2kg/667m2为宜,最好单独施入播种沟内,不要与种子混合施用. 相似文献
4.
为了探索永定六月红芋的商品有机肥适宜施肥量,实施本试验。结果表明:随着商品有机肥施用量逐渐增加,产量也逐渐提高;处理5产量最高,达1 570.0kg/667m~2,施肥效益达4 880.0元/667m~2;处理4产量达1 504.5kg/667m~2,施肥效益最高,达4 901.1元/667m~2。综合产量和施肥效益认为,处理4商品有机肥施用量(600kg/667m~2)最适宜。 相似文献
5.
目前有关蔬菜作物有机无机肥的配施比例等有关施肥种类不合理的问题依然存在,为获得蔬菜生产上合理施用有机肥的用量,通过对菜心等叶菜和苦瓜开展田间试验,考察施不同量有机肥对菜心等叶菜和苦瓜产量和品质的影响,获取2类蔬菜的有机肥与无机肥配施时的合适用量,并进行了验证。结果表明:(1)菜心等叶菜有机肥与无机肥配施时,产量较高和品质较优的有机肥合适施用量为每茬50 kg/667 m2,若产量水平特别高的叶菜可适当增加至每茬100 kg/667 m2。(2)苦瓜有机肥与无机肥配施时,产量水平一般的苦瓜使用商品有机肥合适用量约为300 kg/667 m2,产量水平特别高的可增至500 kg/667 m2;若使用农家有机肥的合适用量约为750 kg/667 m2。 相似文献
6.
7.
8.
9.
10.
茶渣肥在大棚番茄生产上应用效果初报 总被引:3,自引:0,他引:3
以常规施肥法为对照,应用不同施肥量和配比的茶渣有机无机活性肥(简称茶渣肥,下同)改良大棚土壤,结果表明,茶渣肥施用量在一定范围内(75~125kg/667m2),随着施肥量增加,果枝、第一果穗结果数和初收期产量也随之增加,但当施肥量增加到150kg/667m2时,反而明显下降,说明大棚番茄施用茶渣肥的最高阀值是125kg/667m2。增施茶渣肥在一定程度上具有减轻病害发生趋势,当茶渣肥施用量为125kg/667m2时发病率最轻。 相似文献
11.
介绍了运用冷冻干燥技术进行速溶蛋花汤的加工,研究了生产工艺、特点以及影响产品质量的主要因素。试验表明,采用冷冻干燥技术加工的速溶蛋花汤,具有营养丰富、风味独特、方便快捷等特点。 相似文献
12.
DENG Zhao-jing 《保鲜与加工》2005,(1):153-156
A new definition of inertia,i.e. the momentum is the measuring of inertia of matter, is proposed. The article through and etc., subjects, the correctness of the new notion of inertia:The monentum is the measuring of inertia has been demonstrated, and the unsolved contradictions of the traditional definition of inetia. And the mass is the measuring of inertia has been revealed. 相似文献
13.
香蕉是热带亚热带发展中国家重要的粮食作物和碳水化合物来源。但近年来,香蕉生产受到严重的病虫危害。大多数香蕉栽培品种是三倍体,生长周期长,而且不孕。由于没有种子,给繁殖和育种带来一定的困难。遗传转化技术的发展为香蕉品种的改良提供了一种有效的手段。香蕉的遗传转化方法有电激法、基因枪法、农杆菌介导法等。农杆菌介导法的应用是香蕉品种改良的一个重大突破。香蕉遗传转化的外植体也发展到多种,有原生质体,胚性细胞悬浮系,分生组织,以及横切薄片等。近几年,随着分子生物学的发展,出现了转化效率更高,重复性更好的香蕉遗传转化技术。如农杆菌和基因枪结合法,离心辅助农杆菌介导法、真空渗透技术等。这些新技术新方法的出现,必将推动香蕉产业高速发展。 相似文献
14.
Automobile comfort dynamic simulation is necessary when we predict and evaluate the comfort of a automobile or optimize performance of automobile. The nine DOF vibration model of automobile is established , which acts root mean square value of body in multiple work conditions as comfort evaluation indices. Based on the comfort simulation, the Hongyan 1160 is predicted in the way of comfort. The programmes can be used in many different automobiles . The computational result indicates that the model can simulate vibration of automobile truly. It is significant to research automobile comfort evaluation to optimize performance of automobile and comfort simulation .The computational program can be applied to optimize or simulate which has some reference value. 相似文献
15.
16.
17.
南瓜降糖功能及其系列食品加工技术 总被引:3,自引:0,他引:3
阐述了南瓜在糖尿病辅助治疗方面的功能特性,介绍了南瓜降糖主要制品南瓜全粉、南瓜脆片、南瓜果酱和南瓜肉汁的工艺流程和操作要点。 相似文献
18.
母猪繁殖障碍成因分析 总被引:3,自引:0,他引:3
繁殖障碍是导致母猪淘汰的最主要因素,直接造成母猪非生产天数延长,繁殖猪群生产效率降低,严重影响猪场的经济效益。本文作者对引起母猪繁殖障碍的多方面因素,包括营养因素(如饲养水平、饲料品质、断奶日龄)、环境因素(如温度、湿度、通风、光照)、疫病因素、生产技术及管理因素进行了详细阐述。 相似文献
19.
Applicability of molecular markers in the context of protection of new varieties of cucumber 总被引:2,自引:0,他引:2
G. P. Bernet S. Bramardi D. Calvache E. A. Carbonell M. J. Asins 《Plant Breeding》2003,122(2):146-152
The growing number of candidate varieties presented every year at each national Plant Variety Protection Office and their decreasing genetic variability forces strategies to be adopted that will reduce costs without losing rigour when deciding about the acceptance or rejection of a candidate variety. Molecular markers have been envisaged as a reliable tool to establish differences, but can molecular markers be used for assessing distinctness? A comparison between a molecular and a morphological characterization of 41 seed samples belonging to 36 cucumber varieties and including several external controls has been carried out to investigate the applicability of molecular markers in the context of distinctness, uniformity and stability (DUS) tests and the protection of new varieties. Both types of character indicate the same relationships among main groups, Dutch and Beth‐Alpha types, and Gerking and Slice types, the correlation between distance matrices being only 0.6489. Varieties considered uniform for morphological traits proved not to be so for molecular markers. Therefore, molecular characterization is not offering the same estimates of uniformity and relatedness between varieties as does morphological characterization. External controls were used to establish distinction limits with morphological and molecular dendrograms to focus on those varieties, which were suspiciously similar. The results with cucumber show that molecular identity could be used to assess any lack of distinctness and so corroborate the morphological assessment of candidate varieties. The morphological trait ‘type’ provides distinct characterization of varieties and the molecular characterization of candidate varieties could be used to design better field experiments to assess distinction within each group of morphological cucumber type. 相似文献