The effect of organic matters application for leaf vegetable yield and quality
1998
Yamazaki, H. (Saitama-ken. Horticultural Experiment Station, Kuki (Japan)) | Roppongi, K.
To elucidate the effect of organic matters application for leaf vegetable yields and qualities, this experiment was carried out for 14 cultivations for five years. Eight kinds of organic matters were different of carbon-nitrogen ratio (C/N ratio). The group Of low C/N ratio had decomposed faster than the group of high C/N ratio. From 8 kinds of organic maters, three kinds were chosen according to C/N ratio. Those were soybean meal, big dung compost and cow dung compost mixed with sawdust. Spinach or chingensai (B. vape var. chinensis), lettuce and cabbage were cultivated according to this order in a year. The yields and qualities of these leaf vegetables were examined while applied each kind of organic matters alone, mixed together or mixed with chemical fertilizer. The effect of organic matter applications for the yields and qualities was related to decomposition of organicnitrogen. The response of soybean meal for leaf vegetables was superior to that of pig dung compost and cow drug compost mixed with sawdust, especially for lettuce was the same as that of chemical fertilizer. The response of cow drug compost mixed with sawdust alone was not expected to maintain the yields of leaf vegetables. On the other hand, internal qualities of leaf vegetables in pig dung compost and cow drug compost mixed with sawdust plots were superior to chemical fertilizer plot. Nitrate concentration in those organic matter plots was lower than in chemical fertilizer plot but sugar contents in the former were higher than the latter. Continuous applications of organic maters had improved chemical properties of soil. The amount of total carbon in cow dung compost mixed with sawdust plot and available phosphate in pig dung compost plot had increased. The cation exchange capacity had become high in much quantity of organic matters application plot
显示更多 [+] 显示较少 [-]