How to scientifically manage water and fertilizer in the middle and late stages of rice?
How should water and fertilizer be managed in the middle and late stages of rice? Please provide an introduction to the management methods. Water and fertilizer management in the middle and late stages of rice can refer to the following: (1) Apply panicle fertilizer cautiously as appropriate to promote large panicles, full grains, and high yield. Based on the earlier rice seedling growth and field diagnosis results, for fields with high soil fertility, strong water and fertilizer retention capacity, many tillers, and darker leaves, delay, reduce, and lower the application rate of panicle fertilizer, generally applying 4-5 kg of urea per mu at the 5th-7th stage of panicle differentiation or at the penultimate leaf stage; for fields with poor fertilizer retention capacity, insufficient tillering, and lighter leaf color, appropriately increase the panicle fertilizer rate earlier, generally applying 6-8 kg of urea per mu at the 4th leaf from the top stage when entering the panicle initiation stage, and spray trace element fertilizers such as potassium dihydrogen phosphate on the leaves at the initial heading stage to increase grain filling and raise yield.
How should water and fertilizer be managed in the middle and late stages of rice? Please provide an introduction to the management methods.
Water and fertilizer management in the middle and late stages of rice can refer to the following:
(1) Apply panicle fertilizer cautiously as appropriate to promote large panicles, full grains, and high yield. Based on the earlier rice seedling growth and field diagnosis results, for fields with high soil fertility, strong water and fertilizer retention capacity, many tillers, and darker leaves, delay, reduce, and lower the application rate of panicle fertilizer, generally applying 4-5 kg of urea per mu at the 5th-7th stage of panicle differentiation or at the penultimate leaf stage; for fields with poor fertilizer retention capacity, insufficient tillering, and lighter leaf color, appropriately increase the panicle fertilizer rate earlier, generally applying 6-8 kg of urea per mu at the 4th leaf from the top stage when entering the panicle initiation stage, and spray trace element fertilizers such as potassium dihydrogen phosphate on the leaves at the initial heading stage to increase grain filling and raise yield.
(2) Scientifically and reasonably carry out water and slurry management in the middle and late stages of rice. The middle and late stages of rice growth are the critical period for rice water demand, and drought must absolutely be avoided during this period. According to the water demand characteristics of rice in the middle and late stages, water and slurry management should be carried out quantitatively. This improves the quality of the rice population and enhances stress resistance and seed-setting rate. The specific operation method of water and slurry management is mainly alternating irrigation with shallow water and moist conditions, so as to nourish roots and protect leaves, and reduce and alleviate the harm of rice diseases such as sheath blight. Cut off water about 10 days before maturity.
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