Effects of Nitrogen and Phosphorus Fertilization on Growth, Yield, and Cooking Characteristics of Rice¹

Abstract

One greenhouse experiment and four field experiments were conducted during 1964–65 to determine (a) the effect of rate, time, and method of P fertilization on grain yield, yield components, and cooking quality estimation of rice, and (b) the existence of N × P interactions. Increasing P in 1964 increased lodging and reduced grain yields and 1,000 grain weight. In 1965 there was no influence of P rate. Preplant P produced darker green vegetation, broader leaves, and taller plants than did the midseason application. Differential responses disappeared by harvest time and no differences occurred except for cooking characteristics, which were more favorable with the preplant application. Cooking characteristics were not affected by P rate, but were less favorable as N was increased in three experiments and more favorable in the other experiment. Interactions between time of P application and N rate showed cooking characteristics were more favorable as N was increased and P applied at midseason than when P was applied preplant. Interactions between P application time and P rate showed that increasing P and applying it preplant improved cooking characteristics over those of the same rates applied a midseason. The N X P interactions were inconsistent. In the greenhouse study, soil‐incorporated P increased straw weight more than did broadcast P, but did not affect plant height, panicle number, or panicle weight. Increasing N increased panicle number, total panicle weight, straw weight and plant height. Increasing P decreased height and increased values for the other variables. The only interaction showed that increasing P and incorporating it increased panicle number and straw weight more than broadcasting it.

Effect of Nitrogenous Fertilizers (Urea and Ammonium Chloride) on Plant Characters and Yield Ofrice.

“…Nitrogen also plays a role in grain filling, improving the photosynthetic capacity, and promoting carbohydrate accumulation in culms and leaf sheaths (Mae, 1997). Earlier studies revealed that judicious and proper use of fertilizers can markedly increase the yield and improve the quality of rice (Place et al, 1970) Rice plants produced more number of productive tillers per hill as well as longest panicles where 120 kg nitrogen per hectare was applied. The lowest values of number of productive tillers per hill and shortest panicles were which recorded in control treatment receiving no fertilizer.…”

Effect of nitrogen on rice yield, yield components and quality parameters

“…Nitrogen also plays a role in grain filling, improving the photo-synthetic capacity, and promoting carbohydrate accumulation in culms and leaf sheaths (Mae, 1997). Earlier studies reveal that judicious and proper use of fertilizers can markedly increase the yield and improve the quality of rice (Place et al, 1970). Given the importance of nitrogen fertilization on the yield in grain from the rice plant, it is necessary to know what the best dose is for each variety as well as its influence on components of yield and other agronomic parameters such as the cycle, plant height, lodging and moisture content of the grain, in order to obtain better knowledge of said productive response.…”

Saving the Farmers and Strengthening Food Security by a Promising R cum F Agriculture

“…Fish stir up soil nutrients making them more available for rice. Nitrogen which is an essential plant nutrient being a component of amino acids, nucleic acids, nucleotides, chlorophyll, enzymes, and hormones is well achieved from the Fish faecal matter [7,8,10]. The Molluscs, insects which are harmful to Rice plants are controlled and killed by Fishes.…”

“…Integrated rice-fish farming results in mutual benefit to both rice and fish. Nitrogen which is an essential plant nutrient is also well provided by the fish excreta [8][9][10]. In addition, the aquatic weeds of rice also get reduced due to fish presence.…”