According results of field experiments,N 448.5,P-2O-5 52.5 kg/hm~2,K-2O 180～270 kg/hm~2 and N-P-2O-5～K-2O 1∶0.12∶0.40～0.60 was optimum balance fertilization scheme,and organic complex fertilizers with inorganic fertilizer used were recommend for rareripe taro to obtain high yield and profit.
The field experiments and reseach for four generations for three years indicated that the sexual reproduction seeds of rice C1001B and that of C1001A could produce a certain frequency of polyembryonic seedlings.
Based on field experiments, dynamic changes of leaf area, specific leaf area (SLA) and dry leaf ratio are described and quantified. After wintertime, specific leaf area decreases linearly with logarithmic relative development stage (RDS) and SLA = - 21.07 × In( RDS) + 19. 427. The maximum and minimum specific leaf area is 40 m2/kg and 19 m2/kg, respectively.
Field experiments were conducted in 2002.The results shown that the inorganic N (NO3--N and NH4+-N) in 0 - 20 cm top layer of soil in GCRPS treatments was a little lower than that of paddy control treatment, in 20 - 40 cm layer of soil a little higher, in 40 - 60 cm layer no difference.
The average diameterof floc units increases from 20μm to over 500μm after flocculating 120 min with HAPM of 300 mg/L. The measured residual coefficient of resistance of sand packed pipe ranges between 22. 22 and 30. 25. Field experiments are carried out in S215, 4072 and S206 well groups in Ⅱ4 and 5 blocks, northern part of Shuanghe oilfield, and the experiments results are good.
(2) Through the field experiments, among all treats, the maximum afforestation survival rate was in the underground film treat, averaging 89.48% per tree. The second largest one was 85.82% in the "KeHan 98" treat, men 79.53% in the American dry water treat and 75.62% in the on-ground film treat, while only 70.61% in the control.
The paper,according to on-the-spots investigation,analyzed the technical measures of protecting seismograph from struck of lightning,introduced "lightning conductor of surface instruments in 408UL seismograph"(simply called lightning conductor in follows) and the situation of indoor tests and field experiments,and presented and analyzed some technical measures protecting seismograph systems against lightning applied.
Then, based on the characteristics of different zones, indoor physical experiments and field experiments were conducted, mathematic simulation model were developed, and parameters of these model were measured, calibrated and validated.
When potassium application is 0.375~1.125gk2o/kg soil in Lou soil, AM fungi infection and symbioses will get the best results, and infection rate can reach 74.0% (pot experiments), and 49.0% (field experiments).
Four nitrogen compounds including CO(NH_2)_2,NH_4HCO_3,NaNO_3 and NH_4NO_3 were chosen to study the influences on the agricultural characters, physiological metabolism, officinal component in potted and field experiments.
Pot and field experiments were conducted in Nanpi Eco-agricultural Experiment Station, CAS, from 1995 to 1996. The results show that in saline soil improved by alfafa, application of N can increase grain yield of wheat by 61.2%, relative leaf weight by 16.2% , grain number by 37.36%,grain weight by 10.3% in pot experiment.
Data from field experiments are used to verify the solutions.
In this paper, a general review is made on the problems of vibrations of the ground and nearby buildings induced by railway traffic, and on the researches on this subject in theoretical analyses, numerical simulations, and field experiments.
In field experiments (350 plants per variant), treatment with Exin decreased the development of wilt caused byS.
The plant-protective and growth-stimulating effect of Enatin was examined in laboratory and field experiments.
The dynamics of introduced antagonistic bacteria in the spring wheat rhizosphere was studied in small-plot field experiments during several growing seasons.