In this paper the functional model,which was for the manure effect of NPK and maize yield,was set up through field test. In terms of yield,the best ferlilizer rates were 143 kg/hm 2 of N, 60 kg/hm 2 of P 2O 3 and 35.5 kg/hm 2 of K 2O and commonly achieved the yield of 7100 kg/hm 2～7900 kg/hm 2.The economic and reasonable fertilizer application was also discussed.
A study on fertilizer application for hybrid late rice in tobacco field has been carried out taking Xinxiangyou 80 as material and the results show that the late rice yield for the Rational Fertilization Treatment(applying 60 kg of N and 30 kg of K2O per hectare plus returning tobacco straw into the fields)is 7068 kg per hectare,1831 kg and 2021 kg higher than the two Tobacco Peasant Fertilization Treatments respectively and increased by 35.0% and 40.0%.
Firstly, the contents of soil nutrients in Gengzhuang were analyzed and the nutrients status was evaluated and classified according to the standard of Chinese soil survey techniques. Then, different mathematic models for fertilizer application were established based on the classification results of the nutrients.
There were 7 species of earthworm and their community composition differed much among fertilization treatments. Long term single fertilizer applying would reduce species number, total number, and biodiversity index of earthworm in the field.
The paper summarized the improvement of photosynthetic efficiency of sugarcane population from selection of superior seed cane,planting density,cane field covering,fertilizer applying,field management etc.
The annual NH_3 volatilization was 60 kg N ha~(-1) and NO_3-N leaching loss was 6~84 kg N ha~(-1), according for 15% and 1.4%~20.3% of the applied N fertilizer, respectively.
每年因氨挥发而造成的肥料氮损失量为60 kg N ha~(-1),占施入肥料氮的15%。 NO_3-N淋溶损失量为6～84 kg N ha~(-1),占肥料施用量的1.4%～20.3%。
It was suitable for grow in the coastal area of southeast Fujian and the optimum sowing period was from Summer solstice (June.21)to Great heat (July.23). Suitable fertilizer level was N∶P 2O 5∶K 2O=1∶0 65∶1 95,or N,P 2O 5,K 2O were 375,243,731 kg per hm 2,respectively.
适宜肥料施用比例为 N∶ P2 O5 ∶K2 O =1∶ 0 .6 5∶ 1.95 ,每公顷适宜施肥量为纯 N 375 kg、 P2 O5 2 43 kg、 K2 O 731kg;
With continued progresses in balanced fertilization in China, fertilizer consumption in southwestern China in 1999 was increased by 22.8% as compared to that in 1994. The percentage of increase in consumption of N, P, K and compound fertilizers was 16 3%, 5 1%, 49 5% and 57 8%, respectively.
The effects of different timing of N fertilizer application at the same rate on grain β-amylase activity, protein concentration, weight and malt quality of barley were studied.
There were obvious differences between barley varieties and experimental years in the grain and malt quality response to the timing of N fertilizer application.
Considering the problem of low proliferation rate of bamboo propagules, a study was conducted to see the effect of culm number, fertilizer application and their interaction on growth and proliferation behaviour of Dendrocalamus strictus Roxb.
Results of the study indicate that culm number and fertilizer application affect only the biomass of the plants, while the proliferation of the bamboo propagules was unaffected by these treatments (P ≤ 0.05).
This means a balance of soil phosphorus content between the addition from effluent irrigation, fertilizer applying and leaching from drainage.
例句来源
When actinomycetes antagonist is cultured in the cotton seed cake and usedas a fertilizer for cotton,a stimulating effect on growth of the plant and a decr-ease of percentage of Verticillium wilt has been observed.The isolates of Actino-mycetes which have shown the best results are G_4 and 5406.Throughout thegrowing period,three applications of the antagonist carried fertilizer show a decr-ease of 31-50% disease and an increase of 14-40% yield.The three applicationsof the antagonist carried fertilizer seem ...
A root rot disease of jute caused by Papulospora sp. hitherto not reported from this country was found to distribute in areas along both sides of Chientang River. During the years 1954 to 1959, 14.7 to 24.6 percents of the plants were attacked. The first symptom was the browning of roots and the basal part of stem. In the later stage of infection the conducting system of stem was also affected. The stem was broken and the plant withered in severe conditions. In late August, black sclerotial bodies appeared ...
肥料施用
fertilizer application
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