搜索结果: 151-165 共查到“知识库 农业生物物理学”相关记录876条 . 查询时间(2.635 秒)
电离辐射对甘蔗后代的持续效应（续报）
甘蔗 电离辐射
2008/12/29
射线既能刺激植物的生长,也能改变植物的遗传性,这已为近年来国内外学者广泛研究所证明。而辐射对营养繁殖作物的育种尤其有特殊的价值,因为它所产生的变异容易遗传给后代,而不易发生象种子繁殖作物那样所常见的分离现象。我们曾于1959年应用Co~(60)γ射线照射甘蔗台糖——134品种,剂量分别为100,500,2500,5000和10000伦等五种,试验获得了初步结果。在这研究基础上,我们对处理过的甘蔗...
电离辐射对甘蔗生育影响的初步研究
甘蔗生育 电离辐射
2008/12/29
本试验用Co~(60)的γ射线照射甘蔗,剂量为100伦、500伦、2500伦、5000伦和10000伦。连同对照共六种处理,结果如下: 1.2500伦能激发甘蔗芽的萌动,100伦、500伦和5000伦处理的甘蔗萌芽率都较低。而10000伦处理的甘蔗则完全不萌发。 2.500伦、100伦处理的甘蔗苗,共生长情况(如植株高度、分蘖、叶片长度等)均较对照为优,其中尤以500伦为明显。2500伦、500...
电离辐射对马铃薯生育影响的研究
马铃薯 电离辐射
2008/12/29
马铃薯在我国南方栽培,也是高产作物之一,福建省目前尚有很大面积的冬闲田未加以分利用,因此利用冬闲田扩种马铃薯对提高粮食产量有很大的意义。 本实验除了探讨低剂量辐射对促进马铃薯生育、提高产量外,还研究了不同剂量的辐射马铃薯发芽的抑制作用和晚疫病的防治效果。
电离辐射对蔬菜作物生育影响的初步研究
蔬菜 电离辐射
2008/12/29
本试验的目的,系了解射线对蔬菜的作用与增产的剂量范围,采用本省主要蔬菜——四季豆、南瓜、番茄、甜瓜、豇豆、冬瓜等作为研究材料。 试验材料及方法 供照射处理用的蔬菜种子都是由福建农学院农场供给的,去年采收的干燥种子,照射处理分两类:
电离辐射对水稻生育影响的研究
水稻生育 电离辐射
2008/12/29
水稻是我国重要的粮食作物,以1952年为例,全国水稻种植面积占粮食作物总面积的五分之一强,而产量则将近占全国粮食总产量的一半,这说明了水稻的高产性和它在全国粮食生产中的重要性。因而采取有效措施促进水稻增产是具有重大意义的。许多材料报告电禽辐射
为明确NaCl处理条件下野大豆叶片抗氧化酶和有机渗透调节物质的变化，以不同浓度NaCl处理野大豆幼苗，对其抗氧化酶活性和渗透调节物质含量的变化进行分析。结果显示:随着NaCl浓度的升高，野大豆叶片中超氧化物歧化酶(SOD)、过氧化物酶(POD)活性先升高后降低，而过氧化氢酶(CAT)的活性呈持续下降趋势;丙二醛(MDA)含量在低盐度处理范围内变化不明显，高浓度 NaCl处理时明显高于对照；随着Na...
Attempt to use the SWATREZ and UNDYS models for the simulation of ground water pollution in agrosystems irrigated by municipal sewage
modelling waste water ground water nitrogen hydromorphic soil
2008/12/2
For the simulation of water movement and pollutant transport in the hydromorphic soil profile two numerical models SWATREZ and UNDYS were used. These models are based on water movement in porous mater...
The paper contains the results of research to determine those areas of the bean pod which are most susceptible to cracking. Measurements were taken on pods of five bean cultivars grown ...
Characteristics of grain quality and the endosperm microstructure of some Czech and Polish winter wheats
grain quality microstructure starch wheat
2008/12/2
The grain and flour of two Czech and two Polish winter wheats of the same classification were examined. The quality of the grain (evaluated with standard methods), the endosperm microstructure and the...
Characteristics of organic matter in selected profiles from the Gezira Vertisols as determined by thermogravimetry
soil Vertisol organic matter Sudan thermogravimetry
2008/12/2
Some properties of soil organic matter (SOM) in Vertisols were studied in four profiles from the South, Central and North Gezira of Sudan using Thermogravimetry. The characteristics examined include ...
Effect of subsoil compaction on the hydraulic processes in landscapes
soil density preferential flow subsoil compaction
2008/12/2
In Grey clayey loamy agricultural soils the horizontal and vertical variability of soil density is the dominant factor in the formation of preferential water filtration flow paths. These paths are pre...
Efficient soil solarization for weed control in the rain-fed upland rice ecosystem
solarization LDPE film rice weed control herbicide
2008/12/2
Weed competition causes significant damage (up to 90%) to crop yields. Weed control through chemical means in the form of herbicide is commonly used to kill weeds or inhibit their growth throughout t...
Evaporation of magnetically treated water and NaCl solutions
water evaporation magnetic treatment ma- gnetohydrodynamics NaCl solutions
2008/12/2
This study was designed to evaluate the effects on evaporation of distilled water and tap water subjected to magnetic treatment for different periods of time. Evaporation of NaCl solu- tions magnetica...
Modelling the mass of kiwi fruit by geometrical attributes
kiwi fruit mass models dimensions physical properties geometrical attributes
2008/12/2
The determination of mathematical models for predicting the mass of kiwi fruits from their dimensions and projected areas was done. The research was conducted on 200 observations of two Iranian variet...
Models of particle aggregation and their usefulness
particle aggregation models soil structure
2008/12/2
Two major approaches of modelling aggregation of soil particles (morphological and virtual) have been discussed. Both approaches were found to be complementary and necessary to gain insight in the ag-...