Abstract:The photosynthetic rates ( PR ) in cotton population under different rates of nitrogen application and plant densities were investigaled. The results were as follows.(1) Among density rates of 2500, 3500, and 4500 plants per mu, 3500 plants per mu had the

Abstract:Wheat ear inoculation with scab was made in more than 900 R2 regenerated plants, derived from cultures of immature embryos of Chong-Yang-Hong-Mai X Een No.1. Altogether, 1.88% individuals of resistance to invasion and high resistance to expansion type was

Abstract:According to the sensitivity of male sterility to temperature, 35 polima CMS lines were divided into three groups: ( 1 ) high temperature CMS line ( 62.9% ) ; ( 2 ) low temperature CMS line ( 28.6%) ; ( 3 ) stable CMS line ( 8.5%). THe temperature sensiti

Abstract:The photosynthesis of rice have a afternoon-nap, which is characterized hy the lowest synthetic rate of the day at 13 O'clock ( Beijing Summer time). Spraying water to the leaf could decrease the degree of the nap. When treated with constant temperature a

Abstract:During the senescence of ex-leaves of rice, the amount of ethylene reached a peak at 12 hours after the leaves were detached. This peak appeared before the fast degradation of chlorophyll and protein. Exogenous ACC and ethylene accelerated the degradation

Abstract:The stability of 8 cotton genotypes tested in 6 environments was studied. There were closely positive correlations among three stability statistics, i. e. cofficient of variation, coefficient of variation of genotype X environment interactions and coeffic

Abstract:The pathogenicity of seven strains of Verticilliun dahliae Kleb isolated from seven cotton-producing counties in Hubei province wastested byinoculating these strains on seven differential cultivars belonging to three cotton species ( Gossypium barbadense,

Abstract:The study was conducted by means of soil culture. The main results showed that planting of suitable crops and rotation of paddy rice and dryland crops are effective for the improvement of soil that is polluted lightly by trivalent chromium. The tolereranc

Abstract:The influence of boron on the uptake of K, Ca, Mg, P, Mn, Zn, Cu, and Mo in red clover was studied under soil culture condition. Boron levels were 0.13, 0.75 and 5.0ppm. In all growth periods, the amount of K, Ca, Mg, P, Mn, Zn, Cu, Mo per plant was evide

Abstract:We have analyzed the growth and quality of the one-year-old nursery stock of chinese fir by analysis of variance. The results showed that the growth pattern of the cutting stock is smailar to that of the seedlings. The fast-growing periods are from early

Abstract:Changes of immune funtions in experimentalchronic selenosis of Wistar rats had been studied. Forty six male Wistar rats, weighing 105 to 135 grams, were divided into two groups. Twenty eight rats in the experimental group were fed basal diet supplemented

Abstract:Twelve sheep were used to siudy the distribution of sulphydryl and disulphide groups in oral stratified squamous epithelium. Most of the sulphydryl groups distributed in matrix and tonofilament bundles of the nucleate(nonkeratinized)cells, and small amoun