The tendency of farmers in Indonesia is burning rice straw after harvest. The organic input commonly used in paddy field is rice straw. ha −1 increased soybean grain yield by 0.25 t.In alfisol soil with low organic-C levels, the addition of chicken manure at amount of 10 t Incorporation of crop residues can alter microbial processes in the soil, thereby affecting the availability of nutrients and, in turn, the production of crops. Organic materials should be a top priority in the management for maintaining sustainable agricultural systems. Crop residue management becomes very important in the aspect of long-term soil fertility in a cropping pattern. The results of the soil analysis of 30 locations of Indonesian paddy fields taken randomly reported that 68% of them have C-organic content of less than 1.5% and only 9% had levels of more than 2%. One indicator of the soil fertility decline is from C-organic levels. The use of chemical fertilizers and less attention to the use of organic materials lead to reduced fertility of a lot of paddy soil. During this period, the increase of soybean production is more on the use of inorganic fertilizers, due to it is easy process, practical nature, and availability, as well as high-yielding varieties that are responsive to fertilizer application. In monoculture, the plough tillage and no-tillage generated a higher income per ha than the soybean grown in crop rotation. Soybean plants are mostly grown in paddy fields following the cropping pattern of rice-rice-soybean, or rice-soybean-soybean. The efficiency and effectiveness of nutrient management refers to the sustainability of land carrying capacity which becomes a necessity. Increasing the productivity of soybean ( Glycine max (L.) Merr.) can be done by the integrated land and nutrient management. Both straw compost and chicken manure also showed a positive effect on the use of inorganic and biofertilizers in increasing soybean productivity. In the third season, however, the residual effect of straw compost or chicken manure increased soybean grain yield by 8% and 20%, respectively. There was no effect of rice straw on soybean grain yield.
ha −1 (without organic amendment) to 1.27 t.The results showed that the chicken manure amendment increased grain yield of soybean in the second season, i.e., from 1.03 t Soybean planted on the first dry season after rice harvested was not fertilized (untreated).
The subplot was inorganic N and P fertilizers and commercial biofertilizer (consisting of Rhizobium, nitrogen-fixing bacteria, and P-solubilizing bacteria) applied at planting of soybeans in the second dry season: (1) control (no inorganic and biofertilizer), (2) 50 kg urea ha −1, (3) 100 kg SP36 The main plot was organic: (1) without organic amendment, (2) 10 t The study aimed to investigate an effect of organic fertilizer applied to rice in the first planting season for unfertilized soybean as second crop followed by inorganic and biofertilizer applied in the third season on soybean growth and yield under the rice-soybean-soybean cropping pattern in 2016/2017.
0 kommentar(er)
