In China, excessive use of nitrogen fertilizers in glasshouses leads to nitrate accumulations in soil and plants, which then limits productivity. Melatonin, an evolutionarily highly conserved molecule, has a wide range of functions in plants. We analyzed the effects of melatonin pretreatment on the growth, mineral nutrition, and nitrogen metabolism in cucumber (Cucumis sativus L. "Jin You No. 1...

Given the limited resources of fossil energy, and the environmental risks of excess fertilizer on crops, it is time to reappraise the potential role of food legume biological nitrogen fixation (BNF) as sources of nitrogen for cropping systems in China. 150 soil samples across 17 provinces and 2 municipalities of China were collected and analyzed. A distribution map of the soil fertilities and t...

Protected areas due to their long-term protection are expected to be characterized by good water quality. However, in catchments where arable fields dominate, the impact of agriculture on water pollution is still problematic. In Poland, recently, the fertilization level has decreased, mostly for economic reasons. However, this applies primarily to phosphorus and potassium. In order to evaluate ...

The present work evaluated the effect of soil (S) and foliage (F) applied potassium on growth, yield, quality potato plants. Potassium was added in at recommended rate for all treatments combining mineral fertilizers with K-feldspar biofertilizers, while foliar spraying included application citrate (PC), silicate (PS), monopotassium phosphate (MP). obtained results showed that plant height high...

Purpose. To study of yield formation and protein content in the grain different ripening varieties soft winter wheat under condition using various types doses fertilizers. Methods. Field laboratory (determination content), calculation (collection protein), mathematical statistical. Results. It was found that fertilization systems reliably increased wheat. The use N75 this indicator by 1.2 times...

Taraxacum kok-saghyz (TKS) is a promising natural rubber plant. In the current study we investigated effects of nitrogen, phosphorus, and potassium base fertilizers on growth yield TKS through field experiments. We found that appropriate application can significantly increase root, total sugar TKS. The enhanced when amount nitrogen increased accordingly to 107.2, 10.5 35.3 g m–2. Maximum accumu...

the effects of different levels of nitrogen (100, 200, 300 and 400 mg/l) and potassium (125, 250 and 375 mg/l) on yield and leaf n and k concentrations of tomato were investigated in perlit culture using a factorial randomized design with three replications. the highest fruit yield was obtained with 200 mg/l n. higher levels of nitrogen decreased tomato yield. with increasing nitrogen concentra...

this experiment was conducted in order to study the influence of different levels of municipal solid waste compost and nitrogen rate on grain quality of sweet corn (zea mays l. saccharata) and some soil properties under marvdasht conditions during growing season of 2008-2009. the experiment was arranged as split plots based on a randomized complete block design with two factors and three replic...